Columbia subject headings:
Amniotic liquid--Analysis.
Peptide hormones--Analysis.
Prenatal diagnosis.
Steroid hormones--Analysis.
Harvard subject headings:
Amniotic liquid--Analysis.
Peptide hormones--Analysis.
Prenatal diagnosis.
Steroid hormones--Analysis.
Princeton subject headings:
Amniotic fluid--Analysis and chemistry.
Peptide hormones--Analysis.
Prenatal diagnosis.
Steroid hormones--Analysis.