Can you conceive if you have not had a period in 3 months?

May be difficult: If your periods are very irregular, you may not be ovulating (releasing an egg) every month. If you do not ovulate around the time of intercourse, conception is much less likely. There are many causes for irregular menstruation. You might consider seeing a physician for a full evaluation, especially if you are trying to conceive.

Yes, but...: You could conceive, but you may need an evaluation or treatment as periods should come every month or so. Absence of periods may be from an ovarian or a brain hormonal error, from an endometrial problem or even pregnancy itself.