Letrozole as an Ovulation Inducing Drug in Anovulatory Patients

Introduction nfertility is defined as the inability of a couple to achieve conception after one year of regular unprotected coitus'. Sterility implies an intrinsic inability to achieve pregnancy, whereas infertility implies a disease in the ability to conceive and is synonymous with subfertility. Approximately 90% of couples with unprotected intercourse will conceive within 1 year and sterility affects 12% of Couples. Primary sub-fertility is an absolute state of inability to conceive whereas secondary sub-fertility is the same state developing after an initial phase of fertility.