London: Use of frozen embryos is more likely to produce successful, complication-free IVF pregnancies than those that are fresh, a study has found.A systematic review of more than 37,000 IVF pregnancies showed that there was a reduced chance of mothers bleeding and of babies being born prematurely with low birth weight when the embryos were stored and frozen compared with treatment involving freshly-transplanted ones, the Independent reported.The review of 11 international studies also found that the death rate immediately before and after birth was lower in babies who were born as a result of transferring frozen-thawed embryos into the womb compared with the transfer of fresh IVF embryos.The findings represent a “major paradigm change” in assisted reproduction and could lead to a change in the current policy of preferring fresh embryos to frozen ones, scientists said.
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