Causes of infertility

Infertility is described as the lack of conception after one year of unprotected intercourse (Bayer et al., 2002). However, the amount of time after which treatment to a couple is administered varies considerably. It might be greatly reduced in the case of an obvious infertility problem, such as blockage of the fallopian tubes. Considering that there is an approximate 15-20% chance per month of achieving pregnancy, and that about 73-80% of couples achieve pregnancy before six months of trying, it is justified that an infertility evaluation and treatment are initiated after six months rather than one year of trying.