Obstetricians focus on pregnancy and related health issues, while gynecologists focus on general reproductive health. These two types of medical professionals work together closely. In some cases, these doctors may have certifications in both obstetrics and gynecology, under the OB/GYN title. Doctors with both certifications can handle everything from general reproductive health to the delivery of a baby. Some OB/GYN doctors also act as primary care physicians for people with vaginas.