Will it be difficult to deliver a baby with a big head? This has always been a worry for mothers who want to give birth naturally. In fact, whether the baby can be born smoothly is closely related to the baby\’s head and the mother\’s pelvis. Only when these two parts cooperate with each other can delivery be successful. Let’s take a look at the relationship between the fetal head and the pelvis during childbirth.
In general prenatal examinations, the data we get about the size of the fetal head is only the biparietal diameter of the fetal head measured by B-ultrasound, and the head circumference is also a reference. The surface of the fetal skull is also covered with skin, hair, etc., with a thickness of several millimeters. Therefore, there is still a gap of several millimeters between the actual value and the measured value.
The position of the baby as it passes through the birth canal: with the chin resting on the chest and the birth canal starting from the back of the head.
Both the fetus\’s skull and the pregnant mother\’s pelvis must coordinate with each other for a smooth delivery. Not only that, the coordination of the fetus\’ posture when it is delivered through the birth canal is also very important. The fetus curls up as it enters the mother\’s pelvis, entering through the back of the head. At this time, the fetus\’s face is facing the mother\’s side, and then turns left and right, and its face gradually faces the mother\’s back. Then, entering the end of the mother\’s birth canal, the fetus will tilt its head back. At this time, my mother felt a big rubber ball sandwiched between her legs. As long as this period is passed, the baby\’s head will come out, and then other parts of the fetus will come out relatively smoothly.
(1) When exposed
During labor
When the mother exerts force, she can see the top of the baby\’s head, which is called dewdrops. During this period, the mother needs to use abdominal pressure (power of defecation) to push around to help the fetus come out, so it will be very hard.
(2)When wearing a crown
When the fetal head is tilted back and the head and face are exposed
The mother can see the fetal head without exerting force, which is called the crown. At this time, the baby is about to be born.
Occasionally there are exceptions
Since the entrance to the birth canal is oval, with the left and right diameters larger than the front and rear diameters, the fetus must enter facing one side first when passing through. Then enter forward, follow the curved shape of the pelvis, gradually spiral downward, and pass through the bony birth canal bit by bit.
The final turn of the tread to the rear is called gyration.
If this action cannot be performed smoothly, it will be difficult to enter the pelvis even if the fetus is placed head down. If the baby\’s face is facing the mother\’s belly, it will be difficult to turn around, but many times, if the labor goes well, it will return to normal.
However, if the fetal heart rate begins to drop and the mother becomes exhausted, sometimes a cesarean section is necessary midway.
Warm reminder: Pregnant mothers can only give birth smoothly if they work together
If the labor pains are regular and the contractions are strong, even if the baby\’s head is relatively large, it can pass through the bony birth canal and soft birth canal and be born smoothly. When the cervix is fully dilated, mothers often have ovulationThe feeling of defecation makes me have to force myself to defecate. At this time, the doctor will also teach you how to use force during labor pains. Remember: You must follow the doctor\’s instructions and use force to defecate during labor pains to effectively help the fetus be delivered as soon as possible. Therefore, it is necessary for the mother to cooperate with the force.
Suction and delivery when necessary
Sometimes, if the labor is too long, the expectant mother\’s strength will decrease, resulting in weakened labor pains or a weakened fetal heartbeat. This requires the fetus to come out as soon as possible and use suction to deliver it naturally. It uses a cup-shaped suction device placed on the top of the fetus\’ head and performs 2-3 suctions. This is just a small medical aid. Even if labor is induced, it cannot be said that anything abnormal happened.