Those with irregular menses, how do you conceive successfully? I find it difficult to know when do I exactly ovulate and my fertile period.

You can actually take birth control pills to regulate your periods. It sounds very contradictory but I had irregular periods as a teenager and after going on birth control pills for a month, my periods started becoming regular again. http://www.parenting.com/article/how-birth-control-could-affect-your-fertility