If you ask how many fingers you can give birth to a child, the answer is to open 10 fingers, in fact, the terminology used is that the opening of the mouth of the uterus means the opening of the uterus 10cm, not to say a few fingers, the early opening of a finger, two fingers to say open a finger, open two fingers, and then to say a few centimeters, like 3-5cm, open full means 10cm. The child can only be born, but the birth of a child is not only the opening of the uterus can be born, it is determined by factors other than the birth canal, the mouth of the uterus, there is also labor and fetus, fetus refers to the size of the fetus, if the child is very large is also very difficult, there is also labor, which refers to contractions, contractions are strong enough to give birth to the child, so natural childbirth determines three major factors, labor, labor canal, fetus, these three factors are well coordinated The child can be born only if these three factors are well coordinated.