An increasing number of births happen outside of marriage, signaling cultural and economic shifts that are here to stay, according to a new report from the United Nations. Forty percent of all births in the U.S. now occur outside of wedlock, up from 10 percent in 1970, according to an annual report released on Wednesday by the United Nations Population Fund (UNFPA), the largest international provider of sexual and reproductive health services.Read more on NewsOK.com