Ruwan amniotic ruwa ne mai haske, mai launin rawaya mai ɗanɗano wanda ke kewaye da kare tayin cikin mahaifa yayin daukar ciki. Yana ƙunshe a cikin jakar amniotic, wanda shine membrane wanda ke samuwa a kusa da tayin mai tasowa. Ruwan amniotic yana samar da matashin ɗan tayin, yana taimakawa wajen kare shi daga firgita ko matsi na waje, kuma yana taimakawa wajen daidaita yanayin zafi da yanayin cikin mahaifa. Bugu da kari, ruwan amniotic yana dauke da sinadirai da sinadirai masu muhimmanci ga ci gaban tayin, kuma yana baiwa tayin damar yin motsi da girma ba tare da an killace shi da bangon mahaifa ba.