Many people are not clear about the difference between infertility and sterility, thinking that infertility refers to the inability of a woman to conceive, while sterility refers to the inability of a man to reproduce. Actually, this understanding is incorrect, or rather, incomplete. Infertility should be defined as a couple living together for more than a year, having normal sexual intercourse without contraception, and being unable to cause pregnancy in the female, which is called infertility. Sterility, on the other hand, refers to the situation where the female can get pregnant but cannot give birth. Therefore, there is a certain difference between the two. There are primary and secondary infertility. Primary infertility refers to those who have never been pregnant or given birth before. Secondary infertility refers to those who have previously been pregnant or given birth, but later, due to some reason or disease, are unable to conceive after living together for more than a year, which is called secondary infertility.