When a couple is having regular unprotected intercourse for a period of 12 months and is still being unable to conceive, then you should head to a specialist and get yourself evaluated. Women above 35 should do any evaluation post 6 months of trying to conceive and women above 40 to 3 months. Evaluation should also be done if you have had a family history like diabetes, tuberculosis and others. For more information, visit cloudninefertility.com