…(2) Placental endocrine secretion During pregnancy, the placenta acts as an independent endocrine organ, taking over the functions of the ovaries and anterior pituitary gland, and secretes a group of steroid hormones and protein hormones to maintain pregnancy. The main steroid hormones are progesterone and estrogen, and the main proteins are human chorionic gonadotropin (abbreviated as hCG) and human placental lactogen (abbreviated as hPL). After the seventh week of pregnancy, progesterone is mainly produced by the syncytiotrophoblast cells of the placenta. … *Some of the terminology explanations that mention "hPL" are listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…(2)胎盤の内分泌 妊娠中,胎盤は卵巣や脳下垂体前葉の機能を肩代りする形で,独立した内分泌器官として活動し,一群のステロイドホルモンやタンパク質ホルモンを分泌して妊娠の維持を図る。ステロイドホルモンとしてはプロゲステロンとエストロゲンが,タンパク質としてはヒト絨毛性ゴナドトロピン(hCGと略記)とヒト胎盤ラクトーゲン(hPLと略記)が主要なものである。 プロゲステロンは,妊娠第7週以後は主として胎盤の合胞体栄養膜細胞から産生される。… ※「hPL」について言及している用語解説の一部を掲載しています。 出典|株式会社平凡社世界大百科事典 第2版について | 情報 |
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