A Comparison between Maternal Serum Free β-Human Chorionic Gonadotrophin and Pregnancy-Associated Plasma Protein A Levels in First-Trimester Twin and Singleton Pregnancies

Publisher: Karger

E-ISSN: 1421-9964|19|2|174-177

ISSN: 1015-3837

Source: Fetal Diagnosis and Therapy, Vol.19, Iss.2, 2004-02, pp. : 174-177

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Abstract