The main reason why it is easier to get pregnant when you have intercourse at night is that you will go to sleep soon after having intercourse at night, so the semen will be in the vagina for a longer time and will enter the uterine cavity and reach the fallopian tubes as soon as possible, which will increase the chances of pregnancy. If you have intercourse in the morning, you will have to get up and go to work soon, and a lot of semen will be discharged from the vagina after intercourse, which will reduce the chance of pregnancy, so it is advisable to have intercourse at night if you want to plan a pregnancy. In addition, the night after the room can be fully rested, after all, the same room will consume a certain amount of physical strength, will feel a state of fatigue, the night after the room directly into the sleep state, will make the energy better recovery, so that the physical strength better recovery.