Ma'anar ƙamus na kalmar "gestational age" yana nufin tsawon lokacin da ya wuce tun daga ranar farko ta lokacin haila na ƙarshe har zuwa kwanan wata, wanda ake amfani da shi don kimanta shekarun haihuwa a lokacin daukar ciki. . Yawancin lokaci ana auna shi a cikin makonni da kwanaki, kuma kwararrun kiwon lafiya suna amfani da shi don bin diddigin ci gaban tayin da kuma tantance lafiyar ciki gaba daya.