Start with high-confidence obstetrics & gynecology books, then narrow by subgenre or adjacent topics.
Living Well With Endometriosis
Kerry-Ann Morris
The Pause
Lonnie Barbach
The New Menopause
Mary Claire Haver MD, Mary Claire Haver
Maternal-neonatal Nursing Made Incredibly Easy!
Lippincott Williams
Period Power
Maisie Hill
Menopause
American College of Obstetricians and Gynecologists
Berek and Novak's Gynecology
JONATHAN S. BEREK
Mayo Clinic Guide to a Healthy Pregnancy, 3rd Edition
Dr. Myra J. Wick M.D. Ph.D., Myra J. Wick