Influence of Birth Order and Maternal Age on the Human Sex Ratio at Birth

The influence of maternal age, spacing and number of pregnancies on birth weight and height

In this study the relation between maternal age, spacing number of pregnancies and birth weight and height was evaluated 1000 newborns in Fatemeh hospital in Hamedan. The growth parameters of newborns from mothers aged  18-35 years, were more than newborns from mothers under 18 or over 35 years. Also infants born from mothers, how had less than 24 months interval between pregnancies weight less...

Maternal age at child birth, birth order, and suicide at a young age: a sibling comparison.

Previous studies have reported strong associations between birth order, maternal age, and suicide, but these results might have been confounded by socioeconomic and other factors. To control for such factors, we compared suicide risk between siblings and studied how maternal age at child birth and birth order influenced risk in a cohort study of 1,690,306 Norwegians born in 1967-1996 who were f...

P-43: The Association of Birth Weight with Maternal Age, Parity, Sex Neonatal

Background: Fetal growth and birth weight is associated with a lot of factors and specific conditions that can exist or are produced pregnancy. The purpose of this study was assessment of birth weight and its relation to gender, parity and maternal age in Kosar hospital, Qazvin in 2010. Materials and Methods: In this cross sectional study, 3076 women with the normal vaginal delivery (NVD) entre...

Birth order, motor performance, and maternal influence.

Sex ratio at birth and latitude.