we have previously demonstrated that quantitatively the major secretory protein of the human endometrium from the latter half of the first trimester of pregnancy , pregnancy-associated endometrial alpha 1-globulin ( alpha 1-peg ) , is a small mol wt insulin-like growth factor binding protein ( igf bp ) and is detected at high levels in amniotic fluid .
C0032979
first trimester
C0032961
pregnancy