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  1. #1
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    Question for Dr Carole - which blast?

    Hi Dr,

    I wanted to ask our opinion on which blast I should use. I have 2 tested day 5 blasts, one fully hatched (grade BB) and one early blast, grade B. Should I thaw the early blast the night before the transfer to see how it progresses, or just go ahead and implant the fully hatched one? We only want to transfer one.

    Also, what are the odds of a fully hatched day 5 blast splitting into twins? I am slightly scared of that prospect. Many thanks!

  2. #2
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    Why would you go with the lesser quality blast? Fully hatched is as good as it gets!
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  3. #3
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    Quote Originally Posted by nuthinbutpink View Post
    Why would you go with the lesser quality blast? Fully hatched is as good as it gets!
    I would agree. This one is begging to implant.

  4. #4
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    Thanks NBP and Carole!

    Carole, if you're still reading, could you let me know what the odds are of a fully-hatched day 5 splitting into twins?

    Thank you!

  5. #5
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    Quote Originally Posted by luxelover View Post
    Thanks NBP and Carole!

    Carole, if you're still reading, could you let me know what the odds are of a fully-hatched day 5 splitting into twins?

    Thank you!
    There is no way to know because you would have to track a sizeable number of single transfer fully hatched blasts and this is relatively rare - pretty sure no one has this data. Most transfers are mixed- more than one embryo and often at different stages and grades. If you want to avoid twins, it is always better to transfer one rather than two. It is true that sometimes the one will split- but I don't think there is any data for how often it happens. Good Luck!

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    Thank you!

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