the occurrence of alpha-fetoprotein ( afp ) -containing hepatocytes in 12 human embryos and fetuses ranging from 30-32 days of estimated ovulation age ( streeter 's horizon xiv ) to 16-17 weeks of estimated menstrual age was investigated using the direct ( horseradish peroxidase ( hrp ) -labeled anti-human afp horse igg ( fab ' ) 2 ) and/or indirect immunoperoxidase methods .
C0002210
alpha-fetoprotein
C0015965
fetuses