want to get pregnant with irregular cycle.

Hi,
Welcome to ehealthforum,
Irregular menstrual cycles could indicate that you are not ovulating periodically and hence it could be difficult to get pregnant. The chances of having a successful pregnancy depends on many factors (ovarian, uterine, hormonal, stress etc). You should consider getting a complete infertility work-up done for you and your partner to see if there are any underlying causes for the infertility/inability to conceive. Hormonal issues, problems involving ovaries and ovulation, uterine problems, cervical or vaginal infections should be ruled out for you. For your partner, semen analysis should be done to rule out infections and to confirm the quality and quantity of sperms produced. Treatment as needed (based on examination and investigations results) would be started to help you get pregnant. Consider visiting your gynecologist/obstetrician for further evaluation and assistance and be in regular follow-up.
Have diet with foods rich in zinc content to ensure better maturation of egg and sperms. Monitor cervical mucus changes and the BBT (basal body temperature) charting to predict your ovulation and time your intercourse for having fruitful results. Keep lying still for sometime after intercourse (do not change positions after ejaculation has occurred). Put pillows under buttocks to minimize spill. Have intercourse in positions that allow for deeper penetration for high deposit of semen.
Take care.