pregnancy-associated endometrial alpha 2-globulin ( alpha 2-peg ) , the major secretory protein of the human endometrium as assessed by in vitro de novo synthesis and secretion , during the mid- to late-luteal phase of the menstrual cycle and early first trimester pregnancy , has now been detected immunochemically in uterine luminal flushings during the luteal phase of the menstrual cycle .
C0032961
pregnancy
C0032979
first trimester pregnancy