Other forms: obstetrics; obstetrically
The adjective obstetric describes things having something to do with childbirth. Much of an obstetric nurse's job, for example, is helping laboring mothers.
If you go to medical school, you might have an obstetric textbook, and later you'll probably do a residency in the obstetric area of a hospital, where women give birth. The field is called obstetrics, and both words (along with the alternative adjective obstetrical) come from the Modern Latin root obstetrix, which means "midwife," or literally, "one who stands opposite."