This patient fact sheet reviews different forms of Fertility Awareness, also known as Natural Family Planning. Fertility Awareness is a group of methods that rely on understanding the menstrual cycle. Knowing your fertile days allows you to plan or prevent pregnancy without using any drugs or devices. This factsheet compares different ways to identify fertile days and how they work.

Spanish: Updated 2025

Amharic and French Updated 2021

Chinese (Simplified/Traditional), Vietnamese, and Hindi: Updated 2016

Reading Grade Level (Flesch-Kincaid Grade Level): 7.3

Source:

• theBMJ. Fertility Awareness Based Methods for Pregnancy Prevention. BMJ. 2019; 366:14245. doi: https://doi.org/10.1136/bmj.14245.
• Contraceptive Technology, Chapter 15

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