Birth weight seemed to be affected by many variables. Maternal height could affect fetal weight either genetically or by environmental mechanism. It was also observed that the mean birth weight increased significantly with increasing maternal prepregnancy weight and height. In addition, maternal weight gain during pregnancy was a major determinant of fetal outcome and was found to be a primary indicator of infant morbidity and mortality.
Objective The effect of maternal weight gain during pregnancy on birth weight in 1000 live births with delivery after 38 weeks’ gestation was studied in the Souissi maternity hospital of Rabat.
Study design The mothers were all pregnant with a single fetus and had no pathologies or habits that could modify the birth weight.
Results Average age of the mothers was 27±0.4 years, the average pregestational weight was 62±0.50 kg and the average weight gain during pregnancy was 10.8 kg ±8. Analysis of correlation between the maternal variables and birth weight showed a positive and significant correlation between weight gain during pregnancy and birth weight (r = 0.90). The results appear consistent with those reported in the literature.
Conclusion Appropriate gestational weight gain is needed to optimize infant birth weight.