There are 2 types of female infertility. One is primary infertility, which is cohabitation without contraception for more than a year without pregnancy; and the other is secondary infertility, which is a history of pregnancy, and then never conceived again. Generally speaking, primary infertility is less common and secondary infertility is more common. Today, let’s talk about secondary infertility first. Generally speaking, secondary infertility is caused by abortion, IUD, unclean sex, and other gynecological inflammatory diseases. The process of infertility treatment must first identify the condition of the uterus and fallopian tubes. This means that a hysterosalpingogram is done.