Obstetrics is the field of study concentrated on pregnancy, childbirth, and the postpartum period. As a medical specialty, obstetrics is combined with gynaecology under the discipline known as obstetrics and gynaecology(OB/GYN) which is a surgical field.
Gynecology and obstetrics are twin subjects that deal with the female reproductive system. While obstetrics deals with pregnancy and its associated procedures and complications, gynaecology involves treating women who are not pregnant.
The field of obstetrics thus deals with the well being of the pregnant mother as well as the delivery and healthy outcome.
Obstetricians closely work with the pediatricians and neonatologists to deal with care of the newborn baby to reduce the chances of mortality and disease of the newborn.