Human early pregnancy factor and early pregnancy associated protein before and after therapeutic abortion in comparison with beta-hCG, estradiol, progesterone and 17-hydroxyprogesterone.

Serum activities and concentrations, respectively, of early pregnancy factor (EPF), early pregnancy associated protein (EPAP), beta-hCG, estradiol, progesterone and 17-hydroxyprogesterone were estimated in 20 healthy primigravidae within the tenth to twelfth completed gestational week before and after therapeutic abortion. EPF, beta-hCG and estradiol markedly decreased after termination of pregnancy, whereas progesterone and 17-hydroxyprogesterone concentrations moderately fell. EPAP showed no significant alterations in a 24 hours period. Because of its possible role as immunosuppressive substance and its short half-life EPF may be a promising immunobiomarker for disturbances in early pregnancy.