The artificial insemination technique involves removing the husband’s semen by masturbation and then injecting it into the woman’s uterine cavity with a special fine tube after washing and antigen treatment. The sperm has to swim from the uterine cavity into both fallopian tubes and reach the abdomen of the fallopian tubes (the widest part) to meet the egg discharged from the ovaries, fertilize it, and form a fertilized egg, or embryo, which then develops in the fallopian tubes while running into the uterine cavity for implantation. In contrast to IVF, where sperm and egg complete fertilization inside the body (in the jugular area of the fallopian tube), which is exactly the same as natural conception, IVF involves removing both sperm and egg outside the body, completing fertilization in a laboratory dish, and transferring them back into the uterus 3 days later.