Choosing a Doctor

What Does an OB-GYN Do?

What an OB-GYN does, how they are trained and board certified, the subspecialties within obstetrics and gynecology, and how they compare with other clinicians.

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Key takeaways

  • OB-GYNs specialize in pregnancy and birth (obstetrics) and reproductive health (gynecology).
  • After medical school, they complete a four-year residency, and many become board certified through ABOG.
  • Family physicians, nurse practitioners and certified nurse-midwives also provide much routine care.
On this page

An OB-GYN is a physician who specializes in obstetrics, care during pregnancy, birth and after delivery, and gynecology, care of the reproductive system at every other stage of life. Many people see an OB-GYN as their main doctor for years at a time.

What OB-GYNs do

  • Well-woman care: yearly visits, cervical and breast screening, vaccines
  • Contraception: counseling, prescriptions, IUD and implant placement
  • Sexual health: STI testing and treatment, pain with sex, low libido
  • Period problems: heavy, painful, irregular or absent periods
  • Conditions: endometriosis, PCOS, fibroids, ovarian cysts, pelvic floor problems
  • Pregnancy: preconception advice, prenatal care, delivery, including cesarean births, and postpartum care
  • Menopause: managing symptoms and long-term health
  • Surgery: from minor office procedures to laparoscopy and hysterectomy

Some OB-GYNs stop delivering babies later in their careers and practice gynecology only.

Training and board certification

After four years of medical school, OB-GYNs complete a four-year residency in obstetrics and gynecology. They then need a state medical license to practice. Many go on to become board certified by the American Board of Obstetrics and Gynecology (ABOG), which involves a written exam, an oral exam based on their own cases and ongoing continuing certification. You can check a doctor’s certification and license yourself; our guide to finding and verifying a gynecologist shows how.

Subspecialties

Some OB-GYNs complete extra fellowship training:

SubspecialtyFocus
Maternal-fetal medicineHigh-risk pregnancies
Reproductive endocrinology and infertilityFertility, IVF and hormonal disorders
Gynecologic oncologyCancers of the reproductive organs
Urogynecology and reconstructive pelvic surgeryBladder leakage, prolapse and pelvic floor disorders
Complex family planningComplex contraception and pregnancy care

Other clinicians who provide gynecologic care

ClinicianWhat they often do
Family physicianRoutine screening, contraception, often prenatal care and delivery
Certified nurse-midwifeGynecologic care, prenatal care and birth, usually for lower-risk pregnancies
Nurse practitionerWell-woman care, screening, contraception and common problems
Physician assistantRoutine care, working with physicians

For routine visits, any of these can be a great choice. An OB-GYN is especially helpful for complex symptoms, surgery, higher-risk pregnancies and conditions like endometriosis.

When to see an OB-GYN

ACOG recommends a first reproductive health visit between ages 13 and 15, and a yearly well-woman visit after that. Read about your first gynecologist visit and how often to see a gynecologist. When you’re ready to pick someone, our guide to choosing a gynecologist covers credentials, insurance and fit.

Frequently asked questions

Is a gynecologist the same as an OB-GYN?

Almost always, in the US. All gynecologists train in both specialties; “gynecologist” is often used for doctors who focus on non-pregnancy care.

Can an OB-GYN be my primary care doctor?

Many people use their OB-GYN for most routine care. Check with your insurer, as some plans require a separate primary care physician.

Do I need a referral to see an OB-GYN?

Under the Affordable Care Act, most plans can’t require a referral for in-network OB-GYN care, though some older plans differ. Check your plan.

Sources

  1. American Board of Obstetrics and Gynecology (ABOG)
  2. ACOG — Women’s health FAQs
  3. American College of Nurse-Midwives

Every article is edited by a human and checked against our editorial policy. Spotted a mistake? Tell us.

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