The positions of sexual intercourse are also one of the topics that sex medical scientists study a lot. The so-called position of sexual intercourse refers to the respective positions of the man and woman during sexual intercourse. To conceive, it is necessary to find the position of sexual intercourse that is easy to conceive; to protect the fetus, it is necessary to find the position that can protect the fetus; in order to reduce the chance of conception, of course, it is necessary to research the position of sexual intercourse that is not easy to conceive.