1. Fetal position and development At five months of pregnancy, the fetus has obvious body proportions, with a length of about 20 centimeters and a weight of about 200 grams. At this time, the fetus has begun to make obvious movements and can move its hands and feet, make fists, stretch, etc. In addition, the fetus\’s hearing and vision also begin to develop, and it can hear the mother\’s voice and feel changes in light. 2. The impact of internal environment on fetal development The internal environment is crucial to the health and development of the fetus. pregnant