The probability of successful pregnancy preparation is lower for women who are older than 35 years old compared to women of normal childbearing age. During the preparation period, it is important to take care of your health condition and not to gain too much weight to avoid the occurrence of gestational diabetes and hypertension, and to take folic acid because the probability of having a deformed baby increases significantly in older women. Appropriate exercise during pregnancy preparation can also help to enhance physical fitness and improve the ability to conceive. For those who have had abnormal fetuses, it is advisable for the couple to go to the Department of Eugenics and Genetics for some relevant examinations and consultations to see if special treatment is needed.