Ways to Increase Your Chances of Having Twins Having twins is a dream for many couples, and while there are genetic factors, there are many other reasons that influence the outcome. For people who want to increase their chances of having twins, there are a few things to note. 1. Assisted reproductive technology Assisted reproductive technology is a method to increase the chance of giving birth to twins. Such as in vitro fertilization and in vitro fertilization, which can help treat infertility and increase the chance of giving birth to twins.