The phrase "early gestation" refers to the early stages of pregnancy when the fertilized egg begins to develop and grow inside the mother's womb. Full definition
Development of the intercaruncular areas during early gestation and establishment of the bovine placenta (pnas.org)
Pregnant women need to protect themselves in every possible way not to get chilled at early gestations, inter alia, on the 8th week. (infobaby.org)
Those who are lucky might not discover their pregnancy until several weeks into it, allowing them to skip past some of the most worrisome days of early gestation. (checkpregnancy.com)