An obstetrician & gynecologist, or OB/GYN, is a physician who specializes in the diagnosis and treatment of disorders of the female reproductive system (gynecologist), as well as the care of women who are pregnant and the delivery of babies (obstetrician). Many physicians specialize in both of these fields in order to provide complete overall health services to women at any stage of life.

Some common sub-specialties of obstetrician/gynecologists are:

Maternal-fetal medicine: special focus on high-risk pregnancies
Reproductive endocrinology and infertility: a focus on finding the cause of and treatment for infertility
Gynecological oncology: diagnosis and treatment of cancers of the female reproductive system
Family planning: advice on contraception, as well as abortion
Menopausal and geriatric gynecology: treatment of women going through menopause as well as senior citizens

The area of Twain, CA has a population of approximately 120 people. There are 3 obstetricians & gynecologists near Twain, which gives it a ratio of 1 obstetrician & gynecologist per 40 residents or a ratio of 1 obstetrician & gynecologist per 20 households. There are 61 households in Twain.