Preparation for 5 months or no pregnancy belongs to the failure of preparation for pregnancy, caused by more reasons to find specific reasons for treatment as follows: First, may be a woman’s menstrual irregularities, regular menstruation is possible to get pregnant, menstrual irregularities will lead to ovulation abnormalities. Secondly, it may be caused by disease factors, such as male prostate hyperplasia, penile abnormality, women suffering from cervicitis, ovarian cysts, vaginitis, etc., may lead to the failure of ovulation. Third, it may be the emotional impact, the urgent desire to get pregnant during the preparation of emotional tension, but will affect the results of pregnancy. Fourth, it may be the way of coitus is problematic, did not choose to coitus at the time of ovulation or the woman’s uterus is posterior, the way of coitus will affect the probability of conception. Fifth, is the existence of bad habits, such as smoking, drinking, love to stay up late and so on.