At the beginning of the month, he was only as big as a small goldfish, and by the end of the month, he grew to almost the size of a mango. The four-month-old baby has developed into a shaped little person, about 12 cm in size, which is similar to a pear and can just be placed in the palm of your hand.
At this time, the height of pregnant mommy's uterine bottom is about 14 cm, and the uterus has grown between navel and pubic symphysis. After four months of pregnancy, the pregnant mother has just entered the second trimester. The size of her stomach varies from person to person, some are relatively large, and some are flat, so she can't see her pregnancy at all, but the fetal position is roughly the same, about before her mother's umbilicus shame, as shown in the above picture.
However, because the fetal nerve and motor system have not been developed yet, there is no fixed law of fetal movement. At the fourth month of pregnancy, the main organs of the fetus, such as stomach, kidney, eyes, ears, intestines, bones and reproductive organs, gradually developed and began to have certain functions. I am pregnant for 4 months, that is, about 16 weeks. At this time, the pregnant mommy's belly only bulges a little, which is not very big. Generally, most pregnant moms' bellies can be seen until about 5 months (17~20 weeks). There is also a situation where the uterus is neither anterior nor posterior, so the pregnant woman should have a little big feeling in her stomach when she is pregnant for four months, and the uterus will move up against other organs during the big process, so the pregnant woman will obviously feel that her stomach is slightly bigger.