The US couples who 'adopt' embryos
After Jennifer and Aaron found out they were infertile, they decided to "adopt" an embryo.
The National Embryo Donation Center (NEDC) in the US allows couples to use embryos left over after other couples have received IVF.
The number of births from donated embryos in the US has roughly doubled in the last decade. It is particularly popular in pro-Life circles, as people regard it as a way of "saving a life".