In a retrospective study 10,292 case histories of pregnant women have been evaluated, whether maternal weight especially overweight, may influence the course of pregnancy, delivery and puerperium. 44.95% of the women had a normal weight before pregnancy, 24.6% slight overweight up to 10% and 28% exceeded their overweight by 20%. In pregnant women having moderate overweight a preeclampsia could be seen frequently. Although abnormal fetal positions do not occur more frequently in adipose pregnant women, the frequency of caesarean sections is higher in these women compared with normal weight women. Morbidity in puerperium in adipose multiparae is significantly higher compared to other women in childbed, referring to thrombophlebitis and infections of the urinary tract. Therefore adipose women had to be observed more closely. It is necessary to reduce the percentage of adipose women in preconception period by observing strict food prescriptions. This will be a valuable prophylactic prerequisite not only for a healthy life, but also for a pregnancy without complications and the development of a healthy child.