title: [Reply].
authors: Servicio de Obstetricia y Ginecología, Hospital Universitario La Paz, Madrid, España. Electronic address: mdelacalle55@hotmail.com.
authors: María
authors: M
authors: de la Calle
mesh_terms: D005260:Female; D006801:Humans; D018445:Infectious Disease Transmission, Vertical / Q000517:prevention & control*; D011247:Pregnancy; D011251:Pregnancy Complications, Infectious / Q000453:epidemiology*; D013587:Syphilis / Q000453:epidemiology*; D013590:Syphilis, Congenital / Q000517:prevention & control*