Relation between duration of menstruation and gestational diabetes in women referring to teaching hospitals in Tehran

ABSTRACT

Gestational diabetes is defined as carbohydrate intolerance of variable severity at or during pregnancy. Approximately, of pregnancies is affected by diabetes mellitus, of which represents gestational diabetes mellitus [GDM]. Detection of risk factors in GDM may reduce the risk of complications. A new risk factor suggested is abnormal menstrual duration. This case-control study was conducted to determine the relation between duration of menstruation and gestational diabetes in women referring to teaching hospitals at Tehran in 2005. 120 women [60 in case group with GDM and 60 in control group without GDM] referring to GDM and Prenatal Clinics in Shariati and Taleghani hospitals were selected by convenience sampling. An information form was completed by interview for data collection. Content and test re-test methods were used for validity and reliability respectively. Demographic characteristics and abnormal duration of menstruation as well as its etiology were compared between the groups. Those with the history of fetal macrosomia [weight >4500g], diabetes, diabetes in previous pregnancies, neonatal morbidity and mortality, recurrent abortion, smoking before or during pregnancy and preterm delivery were excluded from the study. The groups were matched in terms of their age, parity, body mass index, diabetes mellitus in their close relatives and the history of stillbirth or congenital anomalies. Demographic characteristics and duration [in the case and in the control] as well as etiology of abnormal menstruation were similar between the groups [p=0.34]. No significant relation was found between duration of menstruation and GDM. The relationship between duration of menstrual bleeding and gestational diabetes is disputable