An official website of the United States government
The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before
sharing sensitive information, make sure you’re on a federal
government site.
The site is secure.
The https:// ensures that you are connecting to the
official website and that any information you provide is encrypted
and transmitted securely.
Savvidou MD, Lees CC, Parra M, Hingorani AD, Nicolaides KH.Savvidou MD, et al. Among authors: parra m.BJOG. 2002 Mar;109(3):297-301. doi: 10.1111/j.1471-0528.2002.01130.x.BJOG. 2002.PMID: 11950185
Albaiges G, Missfelder-Lobos H, Lees C, Parra M, Nicolaides KH.Albaiges G, et al. Among authors: parra m.Obstet Gynecol. 2000 Oct;96(4):559-64. doi: 10.1016/s0029-7844(00)00946-7.Obstet Gynecol. 2000.PMID: 11004359
Lees C, Parra M, Missfelder-Lobos H, Morgans A, Fletcher O, Nicolaides KH.Lees C, et al. Among authors: parra m.Obstet Gynecol. 2001 Sep;98(3):369-73. doi: 10.1016/s0029-7844(01)01474-0.Obstet Gynecol. 2001.PMID: 11530114Free article.
Albaiges G, Missfelder-Lobos H, Parra M, Lees C, Cooper D, Nicolaides KH.Albaiges G, et al. Among authors: parra m.Ultrasound Obstet Gynecol. 2003 Feb;21(2):170-3. doi: 10.1002/uog.30.Ultrasound Obstet Gynecol. 2003.PMID: 12601841Free article.
Yu CK, Papageorghiou AT, Parra M, Palma Dias R, Nicolaides KH; Fetal Medicine Foundation Second Trimester Screening Group.Yu CK, et al. Among authors: parra m.Ultrasound Obstet Gynecol. 2003 Sep;22(3):233-9. doi: 10.1002/uog.218.Ultrasound Obstet Gynecol. 2003.PMID: 12942493Free article.Clinical Trial.
Fonseca EB, Celik E, Parra M, Singh M, Nicolaides KH; Fetal Medicine Foundation Second Trimester Screening Group.Fonseca EB, et al. Among authors: parra m.N Engl J Med. 2007 Aug 2;357(5):462-9. doi: 10.1056/NEJMoa067815.N Engl J Med. 2007.PMID: 17671254Free article.Clinical Trial.