Does pelvic size affect labor?

Case sharing: Keyu did not undergo internal diagnosis of pelvic size before delivery, and the fetal weight was also within the normal range. However, during the natural delivery process, she was unable to fully exert force, and the pelvic volume was suspected It was too small, so she had to undergo a temporary emergency caesarean section, which is commonly known as "eating a full meal", so she would have to bear the wound pain caused by both births in the future. The size of the pelvis will not only affect the process of natural childbirth, but may also dictate the delivery method of the expectant mother. However, if you follow the traditional rules of mothers-in-law and mothers and judge the size of the pelvis by observing the woman’s buttocks, it is too generalized. The real The determination method should be based on professional medical equipment and internal examination, so that the result will not be far different from the true size of the pelvis. Part 1 Concept: Pelvic shapes are divided into four categories. The pelvises of humans and primates are not all identical. According to the type, they can be simply classified into four categories. Zhang Jianmei, deputy director of Hexin Xinsheng Maternal and Child Clinic, said that the first type It is the female pelvis, which is characterized by a round or oval shape; the second type is the male pelvis, which has more edges and corners, somewhat similar to the shape of a heart; the third type is the ape-shaped pelvis, which is characterized by being wide front and back and narrow left and right; the last one is the ape-shaped pelvis. The third type has a flat pelvis, which is the opposite shape to the ape-shaped pelvis. It is characterized by being narrow front and back and wide left and right. Among these four types, the most suitable for childbirth are the female pelvis and the anthropomorphic pelvis. The size of the pelvis should not be judged by the naked eye. "Oh, look at you ***, you will definitely be good at giving birth in the future!" I believe that up to now, there are still many women who have heard this sentence, even if it is a joke between acquaintances, It means that this practice was popular in traditional societies for a period of time. Dr. Zhang Jianmei pointed out that in order to judge the size of the pelvis, it is not based on the folk saying of "big or small from the back of a woman". On the contrary, it should be judged by modern scientific methods, such as X-ray or internal diagnosis. , to diagnose the size of the female pelvis. Does pelvic size affect labor? Whether the size of the pelvis affects the process of labor has been the focus of many mothers-in-law since ancient times. Some people even say, "When choosing a wife, you should choose a woman with round and big breasts, so that you can give birth faster"! In response to this question, Dr. Zhang Jianmei said that the factors that affect the progress of labor and the success of natural delivery can be roughly divided into four types, namely the size of the birth canal and pelvis, fetal size, uterine contraction strength, and the force exerted by the expectant mother during labor. Therefore, the size of the pelvis does affect the smoothness of the labor process. However, although this statement seems to be reasonable on the surface, it does not mean that a large pelvis will necessarily lead to faster birth. It must depend on the size of the fetus at that time and the health status of the expectant mother. Part 2 Measurement: Pelvic X-ray Photography Dr. Zhang Jianmei pointed out that in order to measure whether the size of the pelvis can adapt to natural childbirth, doctors used to use pelvic X-ray photography to help expectant mothers take photos of the front and side of the pelvis to measure the fetal head. The symmetrical relationship between the size and the pelvis is classified as narrow, medium or appropriate width. If the width is narrow, the success rate of natural birth is relatively low, and there is a chance of meeting the standards for caesarean section. However, expectant mothers have not yet entered the labor stage when they are exposed to X-rays. Once they enter the stage of labor, the female body will secrete relaxin, which will make the ligaments between bones softer and allow the bones to be easily separated, which will help During fetal delivery. In other words, even if the pelvis is found to be smaller during X-rays, the pelvis may expand during delivery, so the accuracy is only 70%. Pelvic X-rays cannot be used as a complete basis for whether a caesarean section should be performed. , and exposure to X-rays during pregnancy will have the risk of teratogenesis. In addition, during the delivery process, whether the cervix is ??fully opened and whether the fetal head is completely descended are also important factors affecting the labor process, so it is now increasingly Few expectant mothers will undergo this examination. Manual Internal Examination Between 35 and 37 weeks of pregnancy, many doctors usually recommend that expectant mothers should be screened for Group B Streptococcus to confirm whether there are bacteria in the birth canal.

During the examination, cotton swabs will be used to collect the vaginal secretions of pregnant women. Some doctors will do an internal examination of the expectant mother and use their fingers to evaluate whether the angle of the left and right pubic bones is greater than 90 degrees. They will also measure the distance between the fetal head*** length, as well as the distance between the bones above the pubic symphysis and the fetal head. However, due to the different experiences of each medical staff, the accuracy is not 100%. Even the results evaluated by different medical staff are quite different, and they are only of reference value. Text/Interview and consultation with Lin Yiru? Some pictures provided/Photography by Zhang Jianmei, deputy director of Hexin Xinsheng Maternity and Infant Clinic? Makeup and hair style/Benedon advertising style *** performance/Beautiful mom Zhan Jiaqing ※Original article published in the July 2014 issue of "Mother and Baby" Magazine". ※For more exciting content, please visit the Mombaby Pregnancy Life Network (mombaby/). ※This article is published with the authorization of "Mother and Baby Magazine" and any reproduction without consent is prohibited. Subscribe to the Healthy Love Live video and audio channel to read health knowledge more easily. Join and pay attention to your health every day! LINE＠ ID: @：/supply/article/16022/Will the size of the pelvis affect the labor process? Keywords: Mother and Baby Magazine, pelvis, labor process, ***, fetus