Orgasmic Birth: The Best-Kept Secret (also called Orgasmic Birth: 11 Mothers, 12 International Experts or just Orgasmic Birth) is a 2008 documentary film that examines the intimate nature of birth. It had been shown at women's and film festivals since May 2008, before being shown for the first time in prime time on January 2, 2009 by ABC’s 20/20.

The documentary follows the journey of eleven women through labour, presenting how blissful birth can be. Interviews with experts, doctors, midwives, gynecologists, anthropologists, neonatologists, nurses, Lamaze educators, and mothers and fathers explore how the birthing process has become a medical procedure rather than a natural process. Noted narrators include Ina May Gaskin.

While the documentary features several mothers who claim to have had an orgasm during labor, it is primarily about natural labour at the home without drugs.