To determine the sleep stage of , the prediction probability , and. 20+ Similar Discussions Found. Ever seen it? Looks different on white skin vs black skin!The Diagnostic Accuracy of Purple Line in Prediction of Labor Progress in Omolbanin Hospital,. The following data were extracted from each of the included studies: name of the first author, year of publication, country, study design, sample size, demographic data, obstetric data, purple line occurrence (%), numerical data of spontaneous versus induced labour, factors associated with the purple line, correlation coefficients with cervical. gov means it’s official. Knowing how to self check for dilation can help you make decisions and alleviate anxiety as you prepare to give birth. There were no significant difference between primigravida and multigravida in appearance of purple line (p<0. 7% and this accuracy is reduced with the increase of cervical dilatation (5, 6). 15 That Was Intense! – 40-Week Pregnancy Vlog // 8. I've had LOTS of pelvic pressure today and I was told by a few friends and my mom to check myself for dilation. The monitor is connected to the GPU with a DisplayPort cable. How accurate is the Purple Line dilation? It’s about Station Known as a somewhat imprecise assessment of dilation (48-56% accurate. If mine is correct, it is about 6. Several sets of clean sheets. If you have one, it’s quick and safe to check. Advertisement. E. I was googling last week, as I often do and came across this as a method of checking dilation? Apparently the line grows throughout labor and is used to determine how dilated you are. I believe midwives use it to predict dilation. This measurement is most accurate in mom’s who have had a baby previously and if there is not a lot of extra “fluff” on mom. so I don't think it's accurate. 1 km) light rail line being built to link several Maryland suburbs of Washington, D. Deleted User. 87) and with fetal head descent (r = +0. Or rather – your butt crack. 3%) of cases. This is a dark purple line. It literally looks like someone took a purple sharpie up my. . There. The further along you are in dilation, the higher the line extends. 15 Purple Line Dilation – What is the Purple Line in Labor? Purple Line Dilation “Club“ More parents are opting OUT of uncomfortable routine vaginal examinations in labor and prenatally (without a medical indication) and are opting. 3 years ago. Seeing one doesn’t necessarily mean labor is coming right away. The ‘purple line’ is a line of temporary skin discoloration that can be seen in the anal cleft of some women. Most people tend to think of the process as: cervix dilates, uterus contracts, baby is born. How accurate is the purple line dilation? Appearance of the purple line in the prediction of labor progress in the first stage of labor has 90. May 11, 2021 at 5:21 PM. 5% positive. The presence of purple line increased with an increase in cervical dilatation. Suppose we need to graph f (x) = 2 (x-1) 2, we shift the vertex one unit to the right and stretch vertically by a factor of 2. 41-0. Purple line dilation. One which is pretty accurate for late dilation is that thin line or "crease' above the symphysis. 1M views Discover videos related to purple line dilation on TikTok. Background: Precise evaluation of labour progresses can help mothers to be consulted on time and decrease maternal and neonatal morbidities. Dilation (cm) Size Guide. This number increase from 66. 2010). There was a significant correlation between the length of the purple line and cervical dilatation and the station of the fetal head. 5-7cm long meaning I’m about 2. Not really able to measure it well by myself tho (You can Google if you haven’t heard of it but apparently. 11 Comments. Said I was 1cm and 50% effaced - will find out tomorrow. Posted 3/2/23. Purple Line Dilation “Club“ More parents are opting OUT of uncomfortable routine vaginal examinations in labor and prenatally (without a medical indication) and are opting IN to the purple line dilation club as a way of assessing labor progress. 4 cm when the cervical dilatation was 9–10 cm, whereas it was more than 7. Large metal cookie sheet. The purple line is non invasive methods to assess labour progress. May 14, 2023 at 12:44 PM. Don’t ask me how I’ve noticed. 32-0. Am J Obstet Gynecol, 173 (1995), pp. (2)I don’t like nobody acting funny towards me cause i deadass won’t talk to you again 🤷🏼♀️Supposedly a purple or reddish line appears in your butt crack and it's an alternative to internal measurement of dilation. Sign Out. Try to insert the tips of your fingers into your cervix If one fingertip fits through your cervix, you're considered one centimeter dilated If two fit,can we use the purple line as a sign of progression Labor or cervical dilation instead of doing digital cervical checks let's chat about it the purple line is a noninvasive method to assess the progression of Labor now this purple line is supposed to start around the anus and then progress up the cleft of the buttocks as the fetal head comes lower into the. Assess dilation. This appearance has been thought to occur because of the vascular congestion at the base of the sacrum. Wash your hands. Like. In light of this, our work suggests that the infrequent but strong pupil dilation events can be used as an accurate inference of LC activation in response to sensory. J. what is going on? okay so one article I read said that the purple line in your butt crack will get longer the closer you get to 10 cm. According to some research, the overall accuracy of cervical dilation ranges between 48% and 56% with a 1-centimeter error, or 89. came across this Purple Line thing that a lot of doulas and midwives have used. the_robbins. The length of the purple line can vary by a centimeter or two between. 2% sensitivity😀. As dilation occurs and the baby descends down through the pelvis a visible change occurs externally that is an indication of how far the birth has progressed. (1999) E. These differences could be because they had a different sample size or methods. All 8+ how to check for purple line dilation Advanced Guide. There’s no one-size-fits-all approach to bringing a new baby into the world. When checking for exact dilation, studies show the accuracy to be around 48-56%. Perfect for phone cases, , journals, guitars, refrigerators, windows, walls, skateboards, , computers, or whatever needs a dose of originality. Doulas use it as an alternative to internal cervical checks. The basic mechanics of labor are often mixed up in people’s minds. Mine is measuring at 7. Before sharing sensitive information, make sure you’re on a federal government site. 5 weeks ago. This line tends to approximately reflect cervix dilation, with about 1cm of line equalling about 1cm of dilation of the cervix. The possibilities offered to a mother when giving birth are increasingly different. 3) can provide useful values and prediction models on how labor will progress (Additional file. There were six eligible studies included in the systematic review that reported on 982 women in total with the purple line appearing in 760 (77. My midwife noticed the purple line was "complete" and decided to check my dilation. It’s not a stretch mark. Cited by: 3 articles | PMID: 25763210 | PMCID: PMC4329935. . I googled it and it said it’s actually a old wives tale to tell if your dilated, you measure the line. where k is the vertical shift, h is the horizontal shift, a is the vertical stretch and. 3% of cases in active phase of labor. Still not in labor lol I asked my dr about this and she said she never heard about it ♀️. Doulas use it as an alternative to internal cervical checks. This number increase from 66. These researchers hadn’t set out to find out more about the actual physiology of the purple line, but. The Purple Line. 2013; 1(1): 7-12. 3 cm when the. Instead, as we can see from the table above,. If you feel any pain or extreme discomfort, remove your fingers. The Purple Line or Bottom Line. 2013; 1: 7-12. e. purple line dilation! myth or fact? okay I'm super curious. You could be dilated to a 3 or 4 or more. The purple line is non invasive methods to assess labour progress. In Bryne and Edmonds the purple line appeared in 89 % of the women . At my appointment last week I was 3cm dilated and 80% effaced. Cervix dilation symptoms: What does cervical dilation feel like and how to check if you are dilatingCervix dilation symptoms: What does cervical… The presence of purple line increased with an increase in cervical dilatation. What is the purple line in labor? Purple line is one of the non-invasive methods to assess the progress of cervical dilatation and foetal head descent in labour (Shepherd et al. Therefore, this study aimed to determine the. So, when you're at a full 10cm, the line is all the way up to the highest point of the crack. I just checked my behind and I have one 😂 but definitely purple and definitely used to not have. May 2015. I’m 38 weeks tomo. (For interpretation of the references to colour in this figure legend, the reader is referred to the web version of this article. As baby’s head descends, the intra-pelvic pressure increases and the purple line rises. Fertility ; Ovulation Calculator ; Ovulation Symptoms ; Preparing for PregnancyRobyn+2 member. 1% positive predictive value, and 51. A study was done in 2010, and published by BMC Pregnancy & Childbirth, that proves the existence and accuracy of the purple line for many women. Kordi M et al. How accurate is the purple line dilation? Some studies have shown that the overall accuracy for cervical dilatation is between 48% to 56% with ± 1 cm error, to 89. Out of the 350 women enrolled, 61/2% were primigravidas and 38/8% were multigravidas. For example, if the baby is mid-pelvis (between numbers -1 to +1) I would adjust to an asymmetrical lunge position. These differences could be because they had a different sample size or methods. For women either in spontaneous or induced labour, the pooled mean length of the purple line was more than 9. November 16, 2021. The purple line is said to start appearing when your cervix is between zero and two centimeters dilated. Anyone else got the. plays. 1. of these complications could be prevented by identifying women with abnormal labor progress and implementing on time. 3% specificity, 88. Mindy explores the ‘mystical’ red/purple line that has been observed to provide information about cervical dilation without the need for a vaginal exam. 8th - 10th grade. Resources. 32–0. Clean blankets. Introduction:. This is my second baby and I have never heard of this but just today noticed that if i spread my cheeks lol. Main results There were six eligible studies included in the systematic review that reported on 982 women in total with the purple line appearing in 760 (77. asking my Ob to check my cervix tomorrow at my appointment and will test this. There is a reported link between the numbers of VEs a woman has and the risk of pueperal sepsis [16–19]. 2. It allows us to understand how the shape transforms based on the dilation factor and direction. DEM generation by contour line dilation. These differences could be because they had a different sample size or methods. To be honest- even if the line correlates to labor and dilation, if you’re not having consistent contractions then it doesn’t really matter. They conducted a small study with 48 women in spontaneous labour and noted that the purple line was seen on 89% of occasions, was completely absent in five women (10%), and initially absent in three (6%). Business, Economics, and Finance. 3% specificity, 88. Oct 17, 2022 at 9:57 AM. or maybe I'm just oblivious. So for example: at a dilation of 1-2 cm, the purple line was 5. . 2% sensitivity, 45. I guess we’ll see at my next appt if it’s accurate. 4% with a cervical dilatation of 3 cm to 84. 5% to 91. May 16, 2016. But how in the world does that work? Well, as the baby descends into the deep pelvis, the purple line rises up from the outskirts of the anus. Here are the best content by the team thcsnguyenthanhson. Expand user menu Open settings menu. but I came across this. Depending on the distance the two fingers can stretch apart, it’s possible to indicate further dilation. 3% of the women during the active phase of labor. Business, Economics, and Finance. I read about checking your bum for a purple line and that it's an alternative way to checking how dilated you are- I know just dilation doesn't mean labor I'm just curious if anyone has tried it and how accurate it was. 4% specificity, 96. 2013; 1(1): 7-12. Purple Line Dilation - What is the Purple Line in Labor?The quality of a DEM generated by contour dilation will be evaluated by visualizing DEM uncertainty. I’ve been researching this, mine is very high, like almost to the top. 2) The dilation line (sometimes called ‘the purple line’) – In some women and birthing people (not all), a purple, silver, brown or red line can be seen, starting from the anus and developing up between the buttocks. From what I read the line appears because of vascular. Basically, the theory is that starting at 3-4cm of dilation, a dark purple/red lines appears in your buttcrack. Chuyển Đổi Mục Đích Sử Dụng;. Purple line and dilation: I've just been reading about the 'purple line' that can sometimes be seen above the anus in women as an indication of dilation. complementary measures of cervical dilation is neces-Kordi M et al. Oh the ways to waste my time. So instead of the normal pinkish line that's there it's purple and sometimes very dark. 32-0. There was a statistically significant correlation between the measurements for dilation of the cervix and those for the line; in 22% the purple line was discolored and there was no association. Online line it says I should be 10 cm dilated but. This line starts at the anus and moves up the cleft at the beginning of the second stage of labour (Byrne and Edmonds 1990). Therefore, we cannot say that if a woman’s purple line is, say, 1cm long, her cervix is 1cm dilated. . The ‘purple line’ is a line of temporary skin discoloration that can be seen in the anal cleft of some women as they progress in labour. Purple line dilation cervical theory 7kPurple line dilation checking methods alternative ashley march pm Dilation birth chart giving childbirth people hardcore painful pregnancy understand body boredpanda scv center board proves why only but showsAlternative methods of checking dilation {the purple line and more} by. Therefore, this study aimed to determine the. 3% of cases in active phase of labor. How accurate is the Purple Line dilation? Some studies have shown that the overall accuracy for cervical dilatation is between 48% to 56% with ± 1 cm error, to 89. 5-7cm long meaning I’m about 2. Oldest First. 3% of people during the active phase of labor and appearance of the purple line in the prediction of labor progress had 90. May 11, 2021 at 5:21 PM. The current study aimed to assign. Oh the ways to waste my time. Iranian Red Cresent Medical Journal, 16 (11) ): e16183. While the majority of observers systematically repeated their choices (purple symbols; 12 significant at P<0. The Purple Line or Bottom Line This is a purple/dark line that shows up and extends well, to put it delicately, along your natal cleft. As are all things that have to do with childbirth . This number increase from 66. However, my massage therapist is a doula and said that a little hack to know if you’re really in labor is to, while in a contraction, feel your pirformous muscle (Google it, it’s in your butt) and if it’s also. . If the tips of two fingers fit, this means the cervix is 2 cm dilated. 9 (red line). Not really able to measure it well by myself tho (You can Google if you haven’t heard of it but apparently scientific studies show that a line will appear where. AuthorLearn how to check dilation. compare diagnostic accuracy of purple line with transverse diagonal of Michaelis sacral rhomboid to predict labor progress in nulliparous and multiparous women who referred to Om-ol-banin Hospital, Mashhad, Iran from April to August 2012. JMRH, 1 (2013), pp. My midwife pointed out my purple line while I was in labour with my 4th while I was leaning over the back of the bed puffing on gas so then we had 2 midwives and my husband staring at my crack, so glam . You are reading about how accurate is the purple line dilation. You or one of your birth support people can measure your cervical dilation by taking these steps. . I know some women on here don’t think there is any basis to the purple line dilation theory. , Kordi, M. They conducted a small study with 48 women in spontaneous labour and noted that the purple line was seen on 89% of occasions, was completely absent in five women (10%), and initially absent in three (6%). If your waters have broken, it is best not to self check dilation. Does anyone have experience or insight about the accuracy of the purple line for indicating cervix dilation?I’m 34w 5d and already have one. Once the line meets to the top of the crack, you're supposed to be 10cm or fully ready to go. 3% specificity, 88. The presence of purple line increased with an increase in cervical dilatation. I’ve had a pretty high purple line since 30 weeks, and so it wasn’t accurate for me. 7% and this accuracy is reduced with the increase of cervical dilatation (5, 6). @samanthahicks88, Since 35 weeks my "butt crack line"has suggested I'm 10cm lol, I'm sure it works for some people but not me! Got checked at36 weeks and I was closed and not dilated at all! Let me tell you it freaked me out when I first saw it hahaha. Have you seen such a line. According to the appearance of the purple line in most of the cases and its high sensitivity and specificity, it can use it as a non-invasive complementary method for clinical assessment of labor progress. . 5812/ircmj. Feb 27, 2022 at 6:28 AM. Some drs feel this way is more accurate than actual cervical checks. But how in the world does that work? Well, as the baby descends into the deep pelvis, the purple line rises up from the outskirts of the anus. Any experienced mama’s correlate this to going into labor early? I’m only 35+2 but I feel like she’s dropped and I know she’s already in position. I was wondering if any moms have heard of purple line dilation?. Hi everyone! A friend told me about this theory that a purple line appears in your butt crack moving towards your lower back as your cervix dilates. N. We practice identifying these transformations in different pairs of figures. Monitor: Dell U2713HM. I will have a cervix check. 1. tld99. I didn’t have one when I was in the hospital a week and a half ago because I’ve been making my husband look for me I have a light pink line that’s the full 10 cm and then I have another line that’s darker on top of it if that makes sense! I’ve been researching this, mine is very high, like almost to the top. Accuracy and intraobserver variability of simulated cervical dilation measurements. It may even be more accurate than a vaginal examination given that some studies have shown that the overall accuracy for cervical dilation is only between 48% to 56% – and the more. I googled it and it said it’s actually a old wives tale to tell if your dilated, you measure the line. Removable and super stickery. Reflection - The image is a mirrored preimage; "a flip. We found a moderate positive pooled correlation between the purple line length with cervical dilatation (r = +0. How accurate is the Purple Line dilation? Some studies have shown that the overall accuracy for cervical dilatation is between 48% to 56% with ± 1 cm error, to 89. You could be dilated to a 3 or 4 or more for weeks and that doesn’t mean labor is happening. of these complications could be prevented by identifying women with abnormal labor progress and implementing on time. 4% specificity, 96. 9 (blue line) and −0. According to some research, the overall accuracy of cervical dilation ranges between 48% and 56% with a 1-centimeter error, or 89. “Labour Stages” episode by. Not really able to measure it well by myself tho (You can Google if you haven’t heard of it but apparently scientific studies show that a line will appear where. For women either in spontaneous or induced labour, the pooled mean length of the purple line was more than 9. 0% negative predictive value. 152123mum. I'm only 35 weeks and as of 2 days ago I was not dilated or effaced or dropped; nothing. How accurate is the purple line dilation? Does the Purple Line mean labour? Does everyone get a line on their stomach when pregnant? Is it normal to not have a pregnancy line?. Haha. I was super curious about this, so I was reading about it and it actually sounded like a pretty cool thing, so I decided to check myself. This has just been brought to my attention and its just the oddest thing. It is the first time that two-dimensional (2D) images are. Have any of you moms found it to be true?Purple dilation line? k. Known as a somewhat imprecise assessment of dilation (48-56% accurate according to Shepherd et al, 2010 and finding differ in different studies), cervical assessment by internal exam by 2 different providers can widely differ, too. katebrigham1. , 1 1/2 fingerbreadths between these two points would be equal to 7-8 cms. It occurs in about 75% of woman with a 50% accuracy. JMRH Diagnostic Accuracy of Purple Line and Transverse Diagonal of Michaelis Sacral in predicting Labor Progress 8 J Midwifery Reprod Health. (2021). Experimental heat capacities of Mg 3 Sb 2 and Mg 3 Bi 2 from 2 to 220 K can be well described using Eq. That Was Intense! – 40-Week Pregnancy Vlog // 8. (2) ( Fig. For women either in spontaneous or induced labour, the pooled mean length of the purple line was more than 9. Little by little it grows until it reaches 10 centimeters of dilation, at which time the woman. Dilations make a shape bigger or smaller. October 26, 2023 In this blog post, Dr Sara Wickham gathers together evidence for the purple line in labour. Although past research has found the purple line positively correlated with cervical dilatation and fetal head descent in labor [10, 21, 24,34,35], the specificity between VE and the purple line. The line starts at the anus and moves up the cleft. j. 0% when cervical dilatation was 10 cm. 3% respectively [24], [25], which are comparable to the rates observed. Results: The purple line appeared in 75. A line sitting an inch below the natal cleft is probably in. Last edited 07-06-20. 2. It will provide a direct connection to the Metrorail Red, Green and Orange Lines; at Bethesda, Silver. Sign Out. 4% of caesarean deliveries are complicated by postpartum infections [20]; the greater the. 1% positive predictive value, 51. not. Search titles only; Posted by Member: Separate names with a comma. This number increase from 66. 1% positive predictive value, 51. Transverse diagonal of the Michaelis sacral is better predictor for observing labor progress in comparison with purple line in nulliparous and multiparous women referred to Om-ol-banin Hospital, Mashhad, Iran from April to August 2012. , 2015a). ". I know there's been a lot of discussion about this purple dilation line on here, so I'm curious if anybody has had the purple line, but did not go into labor any time remotely soon? They say it really is indicative of being dilated, but with all 4 of my prior pregnancies, I was not aware of "the line". Image: Supplied/Tiny Hearts Education. Measuring this line, called the purple line or the bottom line, is a non-invasive way for caregivers to assess cervical dilation. 0001). 50; 95%CI: 0. And for anybody who doesn't know what the purple dilation line is: Currently, vaginal examination is the gold standard for assessment of labor progress. Fertility ; Ovulation Calculator ; Ovulation Symptoms ; Preparing for PregnancyYou can Google the purple dilation line 😂👌 apparently, when dilation starts, a deep reddish purple line will begin from your bum, growing upwards to the top of your crack. Stage of Labor. Yes I agree, especially since dilation can be found via ultrasound. (This actually worked with both my previous pregnancies but could just be. mamaKkx. This appearance has been thought to occur because of the vascular congestion at the base of the sacrum. I've even personally observed it when attending births as a doula! The “purple line” is said to start appearing when your cervix is between zero and two centimeters dilated. I have to wait. 1995; 173: 942-945. Angle your fingers back towards your anus to most effectively feel your cervix. cervical dilation was 3-4 (cm), the purple line appears among 68. So last week I saw a post about the purple line in your butt crack being an indicator that you’re dilated (most times) and I checked and didn’t have it! I checked again like 4 days ago and noticed I have it super purple and I just checked again right now and it went higher up my crack…. 3 cm when the. ( a) Pupil responses locked to the observer’s reported choice (blue) and locked to feedback (purple). According to a popular post on the Birth Without Fear blog, some women actually develop a dark purple "dilation line" that shows up and extends along your natal cleft, aka your butt crack. Apr 25, 2022 at 1:50 PM. as shown by the purple line. Basically, the theory is that starting at 3-4cm of…Try it the next time you find yourself standing in a long supermarket line. Doubt I’ll be having a baby tonight but it is interesting after doing some research. Summary: Taught by qualified labor and delivery nurses from Mommy Labor Nurse, the Birth It Up online birthing class offers accurate, compassionate, and personalized education for both those preparing to give birth and their support people. 7% and this accuracy is reduced with the increase of cervical dilatation (5, 6). vn synthesize and compile, see more in the section How. Let's look at four types of transformations: rotations (spinning a shape around a point), translations (shifting a shape), reflections (flipping a shape over a line), and dilations (shrinking or expanding a shape). The further along you are in dilation, the higher the line extends. Skip to content. As baby’s head descends, the intra-pelvic pressure increases and the purple line rises. Use of the purple line to diagnose cervical dilatation and fetal head station during labor - Nunes - 2018 - International Journal of Gynecology & Obstetrics - Wiley Online LibraryThe purple line was appeared in 75. a. 5% of vaginal deliveries and 7. Fertility ; Ovulation Calculator ; Ovulation Symptoms ; Preparing for PregnancyAssessing cervical dilatation without VEs: Watching the purple line. Purple line of dilation. 3% specificity, 88. ) The study cited only 48-56% accuracy of vaginal examinations to determine cervix diameter and fetal station. 78 on the Sleep-EDF-2013 dataset. This number increase from 66. The purplish line that appears in your butt crack that can indicate if you’re dilated at all and give an estimate of how dilated you are? I checked today (33+6) and I definitely have a purple line. asking my Ob to check my cervix tomorrow at my appointment and will test this theory out. tld99. Although, they say that when these lines do begin to appear, your 3-4 cm, and then as the line creeps up your bottom, your dilating more. 7 percent, and this accuracy decreases as cervical dilatation increases. Iran Red Crescent Med J . How to self check for dilation. m. There was a medium positive correlation between length of the purple line and cervical dilatation (r = +0. . By Vieta April 11, 2023. Known as a somewhat imprecise assessment of dilation (48-56% accurate according to Shepherd et al, 2010 and finding differ in different studies), cervical assessment by internal exam by 2 different providers can widely differ, too. They also said it depends on skin colour, women with darker skin don’t show the line the same as pale skin does. It is not the purpose of this article to provide either a detailed comparison of DEM generation by contour line dilation with the many other methods that exist or an in-depth evaluation of various methods. Have any of you heard of a purple/red line that rises from your anus up to the top of…DOI: 10. A. The meta-analysis found a moderate positive pooled correlation between the purple line length with cervical dilatation (r = +0. 2a). How accurate is the purple line dilation? Some studies have shown that the overall accuracy for cervical dilatation is between 48% to 56% with ± 1 cm error, to 89. CryptoThe cardiac cycle needs to be considered for accurate measurements. I'm going into the doc tomorrow hoping to be induced in. Purple Line - Anyone? : Have any of you heard of the “purple line” dilation identifier? I linked a picture with the Instagram account/photo about the purple line along your bum crack to see how far dilated you are. In Bryne and Edmonds the purple line appeared in 89 % of the women . Appearance of the purple line in the prediction Appearance of the purple line in the prediction of labor progress had 90. If mine is correct, it is about 6. It showed the purple line appeared in 75. 5% to 91. Accuracy and intraobserver variability of simulated cervical dilation measurements. k. I’ve got a purple line now, not sure if it’s always slightly there, wish I’d have checked it while I wasn’t. By measuring the length of this purple line and comparing it with the total length of a woman’s natal cleft (or the entire length of the crease of her butt), a midwife can determine approximately how dilated a. @mickchick, this makes a lot of sense because I noticed this a few days after feeling like baby was head down. Considering the diagnostic accuracy of transverse diagonal of the Michaelis sacral and purple line, the transvers diagonal of. As already mentioned, the two numbers, length of purple line and cervical dilation, are not perfectly correlated. 3 3. As she dilates, this measurement decreases at about 2 cms per fingerbreadth. We found a moderate positive pooled correlation between the purple line length with cervical dilatation (r = +0. 68). If labor stalls or baby moves up again, this circulatory congestion in the "crack" can lessen. well I wanted an alternative to the standard internal exam. gov or . kjpp9.