Educational information only.

The information provided on NFPfyi is for general educational and informational purposes only. It is not a substitute for professional medical advice, diagnosis, or treatment.

Always seek the advice of your physician or other qualified health provider with any questions you may have regarding a medical condition, fertility, family planning, pregnancy, breastfeeding, or any other reproductive health matter.

Never disregard professional medical advice or delay seeking it because of something you have read on this website. Reliance on any information provided by NFPfyi is solely at your own risk.

Individual variation

Fertility, cycles, and reproductive health vary significantly from person to person. Educational descriptions on this site refer to typical patterns observed in the literature; they cannot speak to any individual's specific experience.

Effectiveness figures

All effectiveness figures cited on this site come from published studies and reflect the conditions and populations of those studies. They are not promises of outcomes for any individual user.

External links

Links to external websites are provided for reference. We do not control, endorse, or take responsibility for the content of external sites.

Editorial transparency

We do not have undisclosed financial relationships with the methods, organizations, or tools we describe. Any sponsored or partner relationships are disclosed on our About page.