It has been widely assumed that there has been an increase in twins over the years, largely attributed to fertility treatments. It seems like there are twins everywhere you turn; perhaps you notice more and more families with double strollers out and about in the mall or more frequent announcements in the media from celebrity parents celebrating the birth of twins. Television shows like "Kate Plus Eight" (formerly "Jon and Kate Plus Eight") or "Texas Multi Mamas" shine a spotlight on multiple birth. Schools report record registration of twins and multiples and educators wrestle with the issue of classroom placement. The increasing incidence of twins has even generated legislation to ensure that twins' rights are protected in school.
A new study analyzes the data related to twin births from 1980-2009 and identifies specific trends outlining the increase. Learn more about the increasing twin birth rate.