It is possible and normal for a fetus to be 2 weeks on the small side, but it is also possible that the fetus may be growth restricted or have a chromosomal abnormality. 1. The due date of pregnancy is also estimated, usually 1~2 weeks in advance or pushed back is within the normal range. So if the fetus is 2 weeks small, it may be normal, and the woman’s ovulation irregularity. 2. When placenta dysfunction syndrome (also known as fetal dystrophy syndrome) is the restriction of the fetus, the fetus is smaller than 2 weeks, it is an abnormal situation. This is related to many factors, such as: the intrauterine and extrauterine environment of the pregnant woman, the placenta, the umbilical cord, and the condition of the sperm before pregnancy. In addition, congenital chromosomal abnormalities may also lead to poor fetal development. Therefore, a 2-week small fetus needs to be evaluated by the doctor in conjunction with the woman’s menstrual history, other developmental indicators of the fetus, and, if necessary, amniocentesis, to determine whether the condition is pathological and whether intervention is needed. During pregnancy, you need to increase the appropriate nutrition, pay more attention to calcium supplements, you can drink more milk, eat fruits and vegetables, seaweed, shrimp, small dried fish and other foods containing more calcium.