the molecular forms of human chorionic gonadotropin ( hcg ) were assessed in serum , urine , and placental extracts by gel filtration chromatography using radioimmunoassays for hcg , hcgalpha , and hcgbeta and a radioreceptor assay for hcg .
C0018062
human chorionic gonadotropin
C0106132
hcgbeta