Men who are preparing for pregnancy do not need to be prohibited from having sex for three months, the requirements for the status of sex are not strict, and a long period of abstinence, the quality of the sperm will also be reduced. Men’s semen is a dynamic process, a short period of abstinence will help increase the sperm content, to improve the probability of fertilization has some help. But with the prolongation of time, the sperm is not discharged for a long time, the quality of the stored semen will gradually decline, the corresponding situation is not conducive to conception, clinical not recommended to prepare for pregnancy before the ban on coitus for three months. Preparing for pregnancy should pay attention to their own physical condition, regular work and rest, avoid staying up late, pay attention to quit smoking and drinking, in addition to pay attention to strengthen the physical exercise, eat more grains, vegetables, fruits, and so on, the physical condition of the stability, the probability of success in preparing for pregnancy will also increase.