Because everyone's physical condition is different, the size of the belly may also vary during pregnancy. Generally, when a pregnant woman is about three months pregnant, her belly is not very large. If the pregnant woman is underweight, it is basically impossible to tell that she is pregnant. If the belly needs to show, it usually takes about four months to show. So, how old is a four month pregnancy?
In fact, at around four months of pregnancy, the pregnant woman's belly may not be very large, but it can be seen that she is pregnant. At this time, the weight of the pregnant mother usually increases by about 2-5 kilograms, and many of the clothes she usually wears may not fit properly. At the same time, this is also the period of the fastest fetal growth. The fetal length may increase from 12 centimeters to 16 centimeters.
At around four months of pregnancy, the fetus's eyes, which were originally biased towards both sides, begin to concentrate forward, and the bones gradually become rubber like cartilage and gradually harden. At this time, the uterus, fallopian tubes, and vagina of a female baby have gradually formed, and the reproductive organs of a male baby can also be seen during examination.
The fetal brain develops rapidly at this time, with brain cells rapidly proliferating and the brain beginning to divide into specialized areas for smell, hearing, taste, vision, and touch for normal development. At this point, the fetus usually has a basic human form.
