Longitudinal analysis of maternal plasma leptin levels during pregnancy, at birth and up to six weeks after birth: relation to body mass index, skinfolds, sex steroids and umbilical cord blood leptin levels. - Schubring,C.; Englaro,P.; Siebler,T.; Blum,WF.; Demirakca,T.; Kratzsch,J. (Horm Res, 1998)