Regardless of whether the woman is having a second or first child, she normally needs to deliver at full term, which is around 40 weeks of pregnancy. The duration of labor may be relatively shorter for a woman in labor than for a woman in labor, but there is no significant difference in the number of weeks of pregnancy. A normal pregnancy takes about 40 weeks from the last menstrual period to delivery. If the second child is delivered at 28 weeks but less than 37 weeks, it is considered premature; if the second child is delivered at 42 weeks or more, it is a premature delivery. The main difference between second and first births is that the fetal head of a first-time mother usually enters the pelvis before delivery, while the fetal head of a second child enters the pelvis with delivery. It is recommended that older women who are pregnant with their second child increase the number of maternity visits, adjust their diet, eat more fresh vegetables and fruits, avoid spicy, greasy and other stimulating foods, and do proper aerobic exercise.