Preterm birth, whether medically indicated, due to preterm premature rupture of membranes or  from spontaneous preterm labour, is multifactorial, but may share similar underlying aetiological mechanisms. Similar  observations were reported by Berkowiitz where some medical conditions (eg diabetes, hypertension) were significantly associated with all categories  togethers with a previous history of preterm birth or uterine abnormality, ethnicity and inappropriate prenatal care. Sociodemographics, lifestyle or some obstetrical characteristics  differed accros categories.