mensturation cycles

yes, your menstration does affect pregnancy. If you dont mentrate you dont ovulate you need to ovulate to get pregnant. Usually going on birth control can help regulate your cycle. If you need more info on this there are many places on the net where you can find satisfying information. Or you can always ask your doctor.

yes it does. i'm not sure of the exact hows and why's. i do know that you ovulate about a week before you get your period. i think that is considered the fertile period. so during that time is when most people will try to get pregnant.