【問題】placenta ？推薦回答
關於「placenta」標籤，搜尋引擎有相關的訊息討論：
常見placenta問答
polyhydramniosplacentafetal circulationMaternal environment impacts fetal developmentGenetic factors affecting prenatal development PdfPlacentaGenetic factors affecting fetal developmentPrenatal development definitionEnvironmental factors that influence prenatal developmentidentify and define the three stages of prenatal development.Environmental factors affecting pregnancy