Document Type : Original Article

Authors

• M Janghorbani
• F Farsi

Associate professor

Abstract

the Epidemiology of normal pregnancies with unknown last menstrual period (LMP) was studied in 1192 singleton  pregnancies.the LMP was unknown in 240(20.3%) pregnancies.unknown LMP is associated with high rates of low birth weight and all low socio-economic and socio-demographic status.such characteristics are also associated with a high rate of preterm deliveries.any possible bias introduced in studies prematurity by ignoring the group of women with unknown LMP should be carefully checked.
 
 
 

Keywords

• last menstrual period
• gestational age
• Low Birth Weight
• Epidemiology