The effect of maternal and paternal height and weight on antenatal, perinatal and postnatal morphology in sex-stratified analyses.

Introduction: Low birthweight is associated with diseases later in life. The mechanisms for these associations are not well known. If the hypothesis concerning "maternal constraint" is correct for humans, as shown in animal experiments, we expect the maternal, not paternal, body proportions to influence antenatal growth and those of both parents to influence postnatal growth.

A pictorial guide for the second trimester ultrasound.

: The second trimester ultrasound remains an important screening tool for detecting fetal abnormalities. This pictorial guide for the second trimester ultrasound is designed to assist practitioners to produce a high quality diagnostic survey of the fetus by demonstrating and describing recommended images. : Each image is discussed in detail and has an associated drawn line diagram to aid in the identification of the important features of that image.