More twin babies are being born today than at any other time since records began. In fact, approximately 1.6 million twin pairs are born around the world every year. Reasons for this twin boom include advancements in medical reproductive technologies. But it can also be explained by the fact that more women are having children later in life. Now you may be asking: how does delayed parenthood increase the chances of a multiple birth?
Click through the following gallery for the answer to this intriguing question, and find out what other factors increase the odds of having twins.