1. Dutta’s D.C. “Textbook of obstetrics”; 7th edition; New central Book Agency (P) Ltd; pp-49.
2. US Census Bureau, Statistics by Country for Female infertility. Population Estimates 2004.
3. American Academy of Family Physicians. Accessed 16/12/2020.
4. Centre for disease control prevention. Accessed 16/12/2020. Assisted Reproductive
Technology.