Federal numbers show more twins are being born in US

LeAnn and Stephen Beloyan of North Hanover, N.J., relax for a few minutes while their two sets of identical twins nap at Capital Health Systems Hospital in Trenton, N.J. on Saturday, July 16, 2005. The babies are, from bottom to top, Lauren; Sarah; Benjamin; and Samuel. (AP Photo/Tim Larsen)

December 2, 2013 6:28:29 PM PST
A new epidemic is being reported in America: A growing number of twins.

Nearly half of babies born to mothers who used advanced fertility aids were multiple births.

Doctors say twins have higher risks of prematurity and serious health problems.

New fertility guidelines encourage doctors and their patients to consider implanting just a single embryo.