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Fertility awareness-based methods of pregnancy prevention

Victoria Jennings, PhD
Section Editor
Courtney A Schreiber, MD, MPH
Deputy Editor
Kristen Eckler, MD, FACOG


Fertility awareness-based (FAB) methods for preventing pregnancy are based upon the physiological changes during the menstrual cycle and the functional lifespan of sperm and ova. FAB methods rely on the following [1]:

The periodicity of fertility and infertility

A single ovulation each cycle

The limited duration of viability of the ovum, which can only be fertilized 12 to 24 hours after release

The limited duration of viability of sperm (three to five days in cervical mucus and the upper genital tract)

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Literature review current through: Nov 2017. | This topic last updated: Sep 28, 2017.
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