Infertility is the inability to conceive after 12 months of unprotected intercourse. Often, people plan pregnancy for one or two months and come to reproductive Medicine or gynaecologist thinking they failed to conceive.
What exactly happens is if 100 couples try to have a pregnancy in one month, only 15 will conceive. That does not mean the other 85 are infertile. So if somebody feels that they have a Problem or a delay in conception, they should understand that they should try unprotected intercourse for at least 12 months. Then if they fail, they should visit the Doctor.