Pregnancy at 16 weeks is equivalent to 4 months. Pregnancy months are calculated from the first day of the last menstrual period, with 7 days constituting a week and 4 weeks making up a month. Therefore, 16 weeks of pregnancy corresponds to 4 months. After 4 months of pregnancy, some pregnant women may feel fetal movements. At this stage, the fetus is approximately 16 centimeters in length, with a crown-rump length of about 12 centimeters and a weight of approximately 120 grams. Clinically, pregnancy is divided into three periods: the first to the third month is early pregnancy, which is the primary period of embryonic formation and fetal organ differentiation; the fourth to the seventh month is the second trimester; and after the seventh month is the late second and third trimester, during which fetal growth and the development of various organs accelerate, marking an important period of fetal maturation. Throughout pregnancy, pregnant women should pay attention to their diet, avoiding spicy and stimulating foods, especially smoking and alcohol consumption, to prevent fetal malformations. Folic acid can be taken during the first trimester to prevent neural tube defects in the fetus. Consuming a variety of foods to maintain adequate nutrition is beneficial to fetal development.
