In relation to marsupial artificial uterus: *what does “culture half way through pregnancy” mean, in this context? (By what yardstick—time? Developmental stage?] * Is it a womb? Or more akin to standard lab/IVF culture 2/n

[dunnart pregnancies are 12.5 days, but much of marsupial development takes place in the pouch with the teat replacing the placenta. Getting the pouch environment, and the shifting nutritional & hormonal content of milk, right is non-trivial] 3/n