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The time between fertilization and birth.
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|Noun||1.||gestation period - the period during which an embryo develops (about 266 days in humans)|
biological time - the time of various biological processes
full term, term - the end of gestation or point at which birth is imminent; "a healthy baby born at full term"
midterm - the middle of the gestation period
trimester - a period of three months; especially one of the three three-month periods into which human pregnancy is divided