1. ASRM/ReproductiveFacts.org
2. Hormone Health Network: http://www.hormone.org
3. ACOG The American Congress of Obstetricians and Gynecologists: https://www.acog.org/Patients
4. CDC Centers for Disease Control and Prevention: https://www.cdc.gov
5. Resolve The National Infertility Association: http://resolve.org