Some European countries like UK, Belgium and Sweden are moving or have brought in a single-embryo policy in In Vitro Fertilization (IVF) treatments, follow the presumption that more than one embryo could generate a twin pregnancy. In women who needs IVF treatments, this kind of pregnancy have risk, because there is a higher chance that twins will be born prematurely and at low birth weights, and the damage related causes high bill to the National Health Service (NHS).
But Professor Debbie Lawlor (epidemiologist at Bristol University) and Professor Scott Nelson, (researcher in reproductive medicine at Glasgow University) said there should have more flexibility in the policy about IVF treatments. In their research of the outcomes for women undergoing fertility treatment in the UK, they discovered that one embryo is not always best. They found a high success of live births in women under and over 40 years when they were implanted with two embryos; success rates were much higher for the under 40s, and for over 40s women were less likely to lead to twins (mostly because older women are less successful in carrying twins to term.)
The researchers suggest that policy of IVF treatments guidance should be based on prognostic indicators because this kind of pregnancy is expensive for families and the state.
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