[Impact of perinatal mortality in multiple pregnancies over total perinatal mortality in a hospital in Monterrey, Nuevo León].
Hernández-Herrera
Ricardo Jorge
RJ
Hospital de Ginecoobstetricia Dr. Ignacio Morones, Instituto Mexicano del Seguro Social, Monterrey, Nuevo León, México. richdzher@hotmail.com
Ramírez-Sánchez
Luis Fernando
LF