conjugated oestrogens (equine ); estradiol; and estriol.
Biochemical tests on hormone levels of estriol and human placental lactogen provide minimal information.
AFP is often part of a triple-check blood test that analyzes three substances as risk indicators of possible birth defects: AFP, estriol, and human chorionic gonadotropin (HCG).
It's called a triple screen because it looks for three substances in the blood: alpha-feto protein (AFP), human chorionic gonadotropin (HCG), and unconjugated estriol.
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