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Use "gestations" in a sentence
"A third of stillborn babies – around 1,200 – are born late in pregnancy after 37 weeks' gestation, at gestations when they might safely be delivered."
"There is a higher complication rate in monochorionic (shared placenta) twin gestations as a result of the placental connections between the twins."
"Multiple marker screening in multifetal gestations: prediction of adverse pregnancy outcomes."