There is no clinical definition of the latest age of female pregnancy, generally over 35 years of age belongs to the senior pregnant women, with the development of in vitro fertilization technology, the age of female pregnancy has also once broken the conventional understanding. The conventional understanding is that women can have children before menopause, but after 35 years of age, women have obvious ovarian dysfunction and declining reproductive capacity, therefore, we generally define women who become pregnant after 35 years of age as elderly pregnant women. The risks of obstetric complications and fetal chromosomal abnormalities faced by pregnant women of advanced age increase dramatically, affecting both post-partum recovery and lowering fetal eugenic rate, so women who have a plan to have a baby should try to choose before the age of 35. Of course, with the development of IVF-assisted reproduction technology, delivery at an advanced age is becoming more and more common, and women can do a good job of reasonable fertility planning.