The results of this analysis are counter-intuitive since 'second best' embryos are generally selected for storage, and are then subjected to freezing and thawing procedures each of which carries risk.
Albeit that the findings are difficult to explain, they are important in that they provide reassurance for cryopreservation programmes about short-term outcome.
More top news
A surgeon linked to two deaths and a series of botched surgeries is to return to work despite an ongoing investigation, ITV News understands
Here is the letter sent by the broadcasters to Prime Minister David Cameron's office in relation to the planned TV leaders debates.
Machete-wielding armed robbers tied up staff and customers of a north Manchester pub during a terrifying raid.