An obstetrician is a doctor who specializes in pregnancy, childbirth, and a woman's reproductive system. Although other doctors can deliver babies, many women see an obstetrician, also called an OB/GYN. Your obstetrician can take care of you throughout your pregnancy, and give you follow-up care such as annual Pap tests for years to come. OB/GYNs have graduated from medical school and completed a four-year residency program in obstetrics and gynecology. The residency trains them in pre-pregnancy health, pregnancy, labor, childbirth, health problems after childbirth, genetics, and genetic counseling.

Source: WebMD