There are some ways that seem a lot more reputable that may increase your odds of having twins. It seems like the older you are when you get pregnant, the more likely the odds are of having twins. Why? Doctors will say that the increased ovulation as you age can produce multiple eggs. And, of course, multiple eggs can result in twins. If you’re up for getting pregnant soon after giving birth, studies have shown that the odds of having twins can be increased if you get pregnant while you are breastfeeding another child. Supposedly, while you’re nursing, your body has a depletion of calcium. This lack of calcium has a great impact on the egg during conception.