For a woman who is under 35, a couple is considered infertile if the woman and her husband have had regular unprotected sex for 12 months without conceiving a child. For women over 35 years old, the couple is considered infertile if they have not conceived a child after 6 months of unprotected intercourse or longer.
Generally speaking, a woman has about 20% of chance of conceiving a child after 1 month of unprotected sex, this chance will be increased to 40% for three months, about 60% for half an year and 80% to 90% after 1 year. Hence, a couple should consider a thorough medical checkup after trying for 1 year if the wife fails to conceive.
Fundamental causes of the male infertility are low sperm count, poor sperm quality,
hormonal imbalance and testicular damage. These account for more than 90% of all the male infertility. Unhealthy lifestyle can contribute to the these factors