Blastocyst culture

Extended culture lets the laboratory see which embryos continue developing, improving selection for single embryo transfer and matching the natural timing of implantation. Where only one or two embryos exist, some clinics prefer an earlier transfer instead.

Also known as: extended culture, day 5 culture

Last reviewed: September 9, 2026. Written by the Antega Editorial Team. General information only — always follow the advice of your own clinic, doctor or pharmacist.