Hellow guys, Welcome to my website, and you are watching [중3 생식과 유전] 3강. 생식기관의 구조│정자와 난자│수정과 발생│배란, 수정, 난할, 착상, 배아, 태아│1란성, 2란성 쌍둥이👶🏻👶🏻. and this vIdeo is uploaded by 은혜로운 과학생활 at 2022-08-03T21:25:57-07:00. We are pramote this video only for entertainment and educational perpose only. So, I hop you like our website.