we conclude that ( 1 ) the total beta-endorphin immunoreactivity level in whole blood is much higher than that reported in plasma , ( 2 ) both plasma- and erythrocyte-associated beta-endorphin immunoreactivity levels vary with gestational age , with a peak level at 24 to 32 weeks of gestation , ( 3 ) amniotic fluid beta-endorphin immunoreactivity levels are unrelated to fetal sex , and ( 4 ) diabetic patients may have a different distribution of beta-endorphin immunoreactivity pools than normal individuals .
C0015965
fetal
C0027361
individuals