Tania Ross conceived 6-year-old Isabella and 3-year-old Sophia through in vitro fertilization. "I'm grateful to medical science for it -- I wouldn't have been a mom," she said.
She is relieved a new study finds British children born through IVF are not at greater risk for developing cancer in childhood. "I think with IFV that worrying process starts well before you're pregnant, so to have something as positive as this is just fantastic," Ross said.
British researchers studied more than 100-thousand children born through IVF between 1992 and 2008. They found 108 cancer cases -- that's a little less then rates for children born naturally.
"In terms of cancer, there is no evidence of an increased risk in the UK population which uses similar techniques of ivf to other countries," said Professor Alastair Sutcliffe, a researcher with University College London.
In vitro fertilization was introduced in Britain in 1978. More than 5 million children worldwide have been born through ivf since then.
Tania says when her daughters are older, she will let them know they were conceived through IVF. "I look at pictures of them as tiny babies and I still cant believe it happened," she said.
She says she wants them to be aware of research and any risks they may face in the future.
Tina Kraus - CBS News
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