The phrase "gestational period" refers to the time it takes for a baby to develop inside its mother's womb before birth. It is the duration of the pregnancy. Full definition
Dogs in general have a very short gestational period of anywhere from 56 to 63 days. (healthguidance.org)
«Nine months may be the proper and natural gestational period for a child,» he told WNYC's Brian Lehrer, but Bharara said it's not enough time for a public corruption case to «mature.» (politico.com)
«Nine months may be the proper and natural gestational period for a child, but in our experience it is not the amount of time necessary for a public corruption prosecution to mature.» (investigativepost.org)