r/TryingForABaby • u/AutoModerator • Apr 04 '26
DAILY Wondering Weekend
That question you've been wanting to ask, but just didn't want to feel silly. Now's your chance! No question is too big or too small. This thread will be checked all weekend, so feel free to chime in on Saturday or Sunday!
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u/developmentalbiology MOD | 42 Apr 04 '26
The slow development and the aneuploidy are likely related, yes β when an embryo is genetically abnormal, this usually slows its development, since the dividing cells have trouble replicating (there are sort of QC checkpoints for the right numbers of chromosomes during cell division).
The outcome of an IVF cycle doesnβt tell you for sure what happened in previous unassisted cycles, but certainly aneuploidy resulting from older eggs is one of the driving forces of lower fertility in the later 30s and beyond.