Gynaecology or gynecology is the area of medicine that involves the treatment of women's diseases, especially those of the reproductive organs. It is often paired with the field of obstetrics, forming the combined area of obstetrics and gynecology. The term comes from Greek and means "the science of women". A gynecologist specializes in caring for the reproductive health of a woman from the time she gets her first period all the way to post-menopause. Any conditions that affect the reproductive system, such as those with the cervix, uterus, ovaries, fallopian tubes, or vagina, are diagnosed and treated by a gynecologist.