The delivery mode of natural birth can further stimulate the development of their brain and lungs through the extrusion of the birth canal during delivery, which is healthier and smarter than the children delivered by caesarean section. But at the same time, there are also some factors that determine whether a mother to be can have a natural birth. Let’s take a look at what factors determine a mother to be’s natural birth.
Factor 1: the passage of delivery from the vagina
The passage through which the fetus is delivered from the vagina is the so-called birth canal in medicine, which includes bone passage and soft birth canal.
The soft birth canal is a curved pipe composed of soft tissues of the lower uterine segment, cervix, vagina and pelvic floor. The soft birth canal is usually closed. During delivery, the soft birth canal expands passively and slowly due to strong uterine contraction and the extrusion of falling fetal head. When the expansion reaches 10 cm in diameter, the baby can pass smoothly.
Generally, the birth canal we call refers to the bone birth canal (pelvis). It is not a smooth vertical channel with four walls, but an irregular oval curved pipe only 8 ~ 9 cm deep. It is not so easy for the baby to pass through it. Moreover, two roadblocks (sciatic spines) are set up in the middle of this irregular curved pipe, and the baby can only pass between them. The average distance of this diameter is 10cm, so babies with big heads are easy to get stuck.
Through the above description, we can know that it is impossible for the baby to descend vertically and come to the world through the birth canal. He must rotate when passing each level and use his head to adapt to the maximum diameter line of the mother’s fixed birth canal. Many babies are blocked in a part of the birth canal for various reasons, resulting in dystocia.
If the mother’s pelvis is abnormal (small development or trauma), some diameter lines in this pipe will be shortened and the baby will be blocked when passing. Sometimes the mother’s pelvic diameter line is normal, but the baby becomes a little fat (giant) after eating and sleeping in the mother’s stomach. Finally, when the baby passes through the birth canal during delivery, it may be stopped because the head is too big and the body is too fat to pass through the mother’s fixed diameter line.
Page 1: factor 1: passage from vagina page 2: factor 2: fetal weight and size
Page 3: factor 3: uterine contractility page 4: factor 4: mental factors of expectant mothers
Page 1: factor 1: passage of delivery from the vagina
Page 2: factor 2: fetal weight and size
Page 3: factor 3: contractility of the uterus
Page 4: factor 4: mental factors of expectant mothers