The biparietal diameter that the pelvis can withstand is 8.5

Compared with caesarean section, women can recover faster after giving birth if they choose natural childbirth, and this method of delivery is more helpful for the growth of the baby. However, there are still necessary conditions for women to choose natural childbirth, such as the size of their pelvis. Can a woman with a pelvis of 8.5cm choose a natural birth? How much is the biparietal diameter of a fetus that a pelvis of 8.5cm can bear?

The biparietal diameter of a fetus that can be supported by a pelvic bone of 8.5

In clinical medicine, external pelvic measurements are generally carried out first, that is, the standard value of the anterior superior iliac spine diameter is 23-26 cm, the standard value of the iliac crest diameter is 25-28 cm, the pubic diameter is greater than 18.5 cm, the standard value of the greater trochanter diameter is 28-31 cm, the standard value of the ischial tuberosity diameter is 8.5-10 cm, and the pubic arch angle is greater than or equal to 90 degrees. 8.5 Within the normal range, you can try to choose natural delivery.

Can I choose a natural birth if my pelvis is 8.5cm?

Criteria for choosing a normal birth:

1. Birth canal: includes pelvis, cervix, and vagina. Osteotomy: 8-9cm, it is an elliptical curved tube with two road stakes in the middle, which is fixed and cannot be changed. Soft birth canal: A tortuous tube composed of the lower part of the female uterus, cervix, vagina and pelvic tissue, which contains fat.

2. Labor force: refers to the contraction force of a woman's uterus, abdominal muscles, and anal contraction muscles. There will be some false labor contractions in the late pregnancy, usually between 20-30 seconds. At the time of delivery, the longest uterine contraction is only about 45 seconds to one minute. Too long a time may cause intrauterine hypoxia.

3. Fetus: For fetuses weighing 5.5 to 6.5 kg, natural delivery is the most suitable choice. The average biparietal diameter of the full-term fetus's neck is 91-93mm, the thinnest meridian width in the mother's pelvis is about 100mm, and the transverse position of the fetus includes: breech position, transverse position of the fetus, and cephalic position tilt, which will also affect the choice of natural delivery.

4. Psychological state: Psychological state plays a very important role in choosing natural childbirth, so women should be fully prepared to choose natural childbirth or cesarean section before giving birth. Only by fully understanding the criteria for choosing a natural birth and some private care after a natural birth can you safely go through the process of childbirth.

What should mothers do during pregnancy?

(1) Childbirth is a natural phenomenon of human reproduction, and the vast majority of mothers are able to survive the birthing process safely. Pregnant mothers should have an optimistic attitude, understand the benefits of natural childbirth to the baby's future growth and development, and strengthen their confidence.

(2) It is important to understand that childbirth is a long process. Only after experiencing sufficient and strong pain can the birth canal be fully expanded and the fetus can be delivered successfully. Therefore, pain is necessary. When the uterine contractions that force the baby to leave the pregnant mother come, don't feel anxious, worried, or unbearable.

(3) Carry out good prenatal checkups, promptly deal with adverse conditions during pregnancy, and provide prompt correction and treatment. Pay attention to adjusting the dietary structure to prevent the fetus from being too large due to lack of nutrition, which will affect the progress of the delivery process.

(4) During the delivery period, pregnant women should listen to their doctors’ advice and choose a suitable delivery method. During childbirth, pregnant women do not need to act on their own and should follow the specific guidance of medical staff.