Gynaecology and obstetrics are the studies of the female reproductive system. Gynaecology normally means treating women who aren’t pregnant, while obstetrics deals with pregnant women and their unborn children, but there is lots of crossover between the two. For example, women may be referred to gynaecologists in the earlier stages of pregnancy, and obstetricians later in their term.
Obstetricians also test foetuses for symptoms of conditions like Down’s Syndrome using ultrasound.
Gynaecologists and obstetricians often work closely with midwives, nurses and other medical specialists such as urologists, who treat bladder problems, and endocrinologists, who deal with hormone production.