![](/img/cover-not-exists.png)
Decreased First-trimester Maternal Serum Free-β Subunit Human Chorionic Gonadotropin and Preterm Birth in Twin Gestations
S. Laughon, A. Rebarber, L. Rolnitzky, L. Fink, D. SaltzmanYear:
2009
Language:
english
DOI:
10.1055/s-0029-1214250
File:
PDF, 67 KB
english, 2009