Gynaecology is the medical practice dealing with the health of the female reproductive system (uterus, vagina, and ovaries). Literally, outside medicine, it means “the science of women”. It is the counterpart to andrology, which deals with medical issues specific to the male reproductive system.
Almost all modern gynaecologists are also obstetricians (see obstetrics and gynaecology). In many areas, the specialties of gynaecology and obstetrics overlap. Gynaecology has been considered to end at 28 weeks gestation, but practically there is no clear cut-off. Since 1st October 1992, this cut-off may be considered to occur at 24 weeks gestation in the United States, since the law and definition of abortion changed to bring it closer to the gestation at which a foetus becomes viable.