《英文msh詞典》Tissues,Fetal
[入口詞] Tissues,Fetal
[主題詞] Fetus
[英文釋義] The unborn young of a viviparous mammal,in the postembryonic period,after the major structures have been outlined. In humans,the unborn young from the end of the eighth week after CONCEPTION until BIRTH,as distinguished from the earlier EMBRYO.