Weissberg N, Algur N, Schwartz G, Shemesh O, Eylath U, Abraham A S
Department of Internal Medicine, Shaare Zedek Medical Center, Jerusalem, Israel.
Int J Gynaecol Obstet. 1990 Dec;33(4):313-6. doi: 10.1016/0020-7292(90)90516-n.
Plasma beta-endorphin (BE) levels (8.6 +/- 0.8 pmol/l) (mean +/- SE) were lower in the third trimester than in non-pregnant controls (14.8 +/- 1.1 pmol/l) (P less than 0.001), increased during labor, to 29.3 +/- 4.4 pmol/l (P less than 0.005) and decreased, 72 h after delivery, to 3.5 +/- 0.4 pmol/l (P less than 0.001). BE levels were found to correlate significantly with uterine muscle contraction (r = 0.966, P less than 0.05) and with cervical effacement (r = 0.974, P less than 0.05) during labor.
妊娠晚期血浆β-内啡肽（BE）水平（8.6±0.8 pmol/l）（均值±标准误）低于非孕对照组（14.8±1.1 pmol/l）（P<0.001），分娩过程中升高至29.3±4.4 pmol/l（P<0.005），产后72小时下降至3.5±0.4 pmol/l（P<0.001）。研究发现，分娩期间BE水平与子宫肌收缩（r = 0.966，P<0.05）及宫颈消失（r = 0.974，P<0.05）显著相关。
