Human placental lactogen, pregnancy‐specific beta‐1‐glycoprotein and alpha‐fetoprotein in serum in threatened abortion

The predictive value of HPL, SP1 and AFP in serum were determined in 109 women admitted to hospital because of vaginal bleeding in the 6th to 19th gestational week. The prediction of abortion based on the initial analysis from the day of admission was found to be 91.7%, 75.9% and 81.8% for HPL, SP1 and AFP, respectively. The corresponding values for prediction of successful outcome were 68.7%, 73.6% and 65.4%. The HPL and AFP determinations were, however, found to be valid only after the 9th and 12th gestational week, respectively. A highly significant positive correlation (r = 0.84, P less than 0.001) was demonstrated between HPL and SP1 suggesting that SP1 measurements might replace HPL in the evaluation of the prognosis in threatened abortion.