The rule of thumb for women age 34 or younger in otherwise perfect health is to try to conceive naturally for one year before a medical consult is advised.

But anyone older than 35, or anyone with gynecologic or medical problems (irregular or painful periods, diabetes, thyroid problems, etc), should seek evaluation by a fertility specialist or her ob-gyn after six months. If a woman is 40 or older, it is appropriate to receive a consult after trying for 3 months.

There are numerous fertility problems that can be treated easily but make it nearly impossible to conceive without medical assistance (one of many examples are blocked fallopian tubes). Time is precious when it comes to fertility and the key is to be informed.