Centers for Disease Control and Prevention | Fertility awareness-based methods of family planning |
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Optimizing natural fertility in couples planning pregnancy |
Evaluation of the menstrual cycle and timing of ovulation.
1Fertility awareness-based methods of pregnancy prevention | Centers for Disease Control and Prevention |
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Optimizing natural fertility in couples planning pregnancy | American College of Obstetricians and Gynecologists |
Fertility awareness-based methods of family planning.
8