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Fraternal twins are much more common than identical twins, because most IVF clinics will implant two embryos at a time, due to the chances of implantation failu
by KMag 3y ago
Fraternal twins are much more common than identical twins, because most IVF clinics will implant two embryos at a time, due to the chances of implantation failure.
(Also, for non-IVF, fraternal twins are also much more common, for different reasons.)
- jedberg 3y agoOur clinic offered a buy one get one free deal instead -- if the first implantation is unsuccessful, the second one is free, just to avoid that risk.
- rrdharan 3y ago> because most IVF clinics will implant two embryos at a time This is very country dependent and is actually changing quite rapidly. I believe these days in the USA standard of care is single embryo transfer. It’s well known that twins are a much higher risk pregnancy: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5846681/ https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5846681/ FWIW when my wife and I went through the IVF process our provider (RMA, who are basically a large US-wide franchise) informed us that multiple embryo transfer was not an option offered by their clinic (not that we would have chosen it, but point is it wasn’t presented as a choice).