Embryology
Embryos are cultured in nutrient media for up to five or six days, allowing the strongest to reach the blastocyst stage. Extended culture helps selection but means some embryos will not survive to day five — that is information about those embryos rather than a laboratory failure.
Also known as: blastocyst culture, extended culture
Related Australia guides
Sources
- European Society of Human Reproduction and Embryology (eshre.eu)
- Royal Australian and New Zealand College of Obstetricians and Gynaecologists (ranzcog.edu.au)
Last reviewed: 10 September 2026. Written by the Antega Editorial Team. General information only — always follow the advice of your own clinic, doctor or pharmacist.