Intra-uterine insemination or IUI is another major type of infertility treatment that is most common among males having ejaculating issues. The treatment includes injecting fresh and healthy sperm directly into the uterus of the female partner which increases the chances of pregnancy. This step can be helpful among patients suffering from unexplained infertility. Also known as artificial insemination, the treatment may also be helpful among females suffering from cervical mucus issues.