Absent or Shortened Nasal Bone Length and the Detection of Down Syndrome in Second-Trimester Fetuses

Gianferrari, Elisa A.; Benn, Peter A.; Dries, Lisa; More

Obstetrics & Gynecology . 109(2, Part 1):371-375, February 2007.

Changes in the Utilization of Prenatal Diagnosis

Benn, Peter A.; Egan, James F. X.; Fang, Min; More

Obstetrics & Gynecology . 103(6):1255-1260, June 2004.

Incorporation of Inhibin‐A in Second‐Trimester Screening for Down Syndrome

Benn, Peter A.; Fang, Min; Egan, James F. X.; More

Obstetrics & Gynecology . 101(3):451-454, March 2003.

Combined Second‐Trimester Biochemical and Ultrasound Screening for Down Syndrome

Benn, Peter A.; Kaminsky, Lillian M.; Ying, Jun; More

Obstetrics & Gynecology . 100(6):1168-1176, December 2002.

Maternal Serum Screening for Fetal Trisomy 18: A Comparison of Fixed Cutoff and Patient‐Specific Risk Protocols

BENN, PETER A.; LEO, MAURO V.; RODIS, JOHN F.; More

Obstetrics & Gynecology . 93(5, Part 1):707-711, May 1999.