Is there anything you can do to increase your chance of getting pregnant? Is there anything you can do or take to increase your chance of having twins

Home vs. Doctor. Healthy living, good diet, no tobacco/alcohol, limit caffeine, intercourse around the time of ovulation. A doctor can help you much more, but these are things you can do at home. Fertility medicines, used for helping women with less-than-normal fertility, increase the chance of twinning but they are by prescription.