Intrauterine levels of human decidua-associated protein (hDP) 200 in normal pregnancy and missed abortion.

Levels of human decidua-associated protein (hDP) 200 were measured in amniotic fluid samples, obtained from 32 induced and 21 missed abortions at 9-20 weeks of pregnancy. A 3-fold decrease in the hDP 200 level was observed between 9 and 20 weeks of normal pregnancy. Moreover, no significant difference was observed comparing the level of hDP 200 and the pattern of its decrease in missed and induced abortions. Thus, according to our results, hDP 200, being a monoclonal rheumatoid factor, is probably not required for the continuation of normal pregnancy.