Delayed blastocyst development is influenced by the level of progesterone on the day of trigger.
Roberta VillanacciGiovanni BuzzaccariniDaria MarzanatiValeria Stella VanniLucia De SantisAlessandra AlteriMassimo CandianiLuca PagliardiniEnrico PapaleoPublished in: Journal of assisted reproduction and genetics (2022)
Progesterone levels on day of trigger correlate to the percentage of expanded (grade 3) blastocysts on day 5 and a delayed blastocyst development day 5 is expected for high progesterone levels.
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