Studies of pregnancy-associated murine serum proteins

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Abstract
A pregnancy-associated murine protein (PAMP) with .alpha.1 electrophoretic mobility and an estimated MW of 140,000 was present in serum from pregnant and sexually mature non-pregnant females but could not be detected in the serum of males. During pregnancy the serum concentration of .alpha.1-PAMP rose to a maximum in mid-pregnancy followed by a decline to preconception levels before parturition. The protein was also present in fetal and neonatal serum and in amniotic fluid at low concentrations.