02/17/2014 12:40 EST | Updated 04/18/2014 05:59 EDT

Fertility treatment babies set record in US, comprised 1 to 2 of every 100 births in 2012

A new report finds that one or two of every 100 babies born in the United States now are conceived with advanced fertility help.

In vitro fertilization, or IVF, in which eggs and sperm are mixed in a lab dish, led to a record 61,740 babies in 2012. That is 2,000 more than the previous year and 1.5 per cent of all births in the nation.

The report by the Society for Assisted Reproductive Technology also finds that more women are using one embryo at a time to avoid multiple births, which raise the risk of prematurity and other problems. Only 4 per cent of women under 35 used single embryos in 2007 but that rose to 15 per cent in 2012.