Female infertility is a health condition that prevents a woman from getting pregnant even after indulging in unprotected sex for 12 months and more. If a woman keeps having miscarriages every time she conceives, it is also called infertility. Female infertility is quite a common phenomenon. At least 10 percent of women deal with infertility issues of some or the other kind. As a woman ages, her chances of being infertile increase.