There is no such thing as whether the best time to conceive is in the morning or at night. In general, the success of conception is related to ovulation, physical health, coitus position and other factors. 1. Ovulation: conception refers to the successful combination of sperm and egg, there is no such thing as whether the best time to conceive is in the morning or at night, there is no scientific basis. Clinical studies have shown that the success of conception and female ovulation related to ovulation, ovulation coitus can to a certain extent can increase the chances of pregnancy, as long as they are not tired, moderate coitus can be. 2. Physical health: the premise of normal fertilization is that both parties are healthy, women do not have tubal obstruction, uterine adenomyosis and other diseases, men do not have vasovaginal obstruction, oligospermia and other diseases. 3. The posture of coitus: if the woman after coitus appropriate in the buttock high pillow, is conducive to the sperm into the uterine cavity, thus indirectly increasing the probability of successful fertilization. If you have any other questions, it is recommended to consult a professional doctor for guidance.