Maternal Morbidity Risk Factors in Nulliparas.

 For every incidence of maternal mortality, maternal morbidity is thought to occur in another 50 to 100 individuals in the United States. Multiple risk factors for severe maternal morbidity have been identified, but counseling about specific risk in pregnancy remains difficult, particularly nulliparous individuals as prior obstetric history is one of the factors influencing risk for severe maternal morbidity. The objective of this study is to examine the association between sociodemographic and laboratory assessments in the first trimester and maternal morbidity in nulliparas.  This was a secondary analysis of a large, multicenter prospective observational cohort of nulliparas. The primary maternal outcome was a composite of hypertensive disorders of pregnancy (HDP), hemorrhage (transfusion, hemorrhage, hysterectomy, other surgery, readmission for bleeding), infection (endometritis, wound infection or dehiscence, pneumonia, sepsis, infection during labor and delivery, readmission for infection through day 14), venous thromboembolic events (VTE) (deep venous thrombosis, or pulmonary embolus), or maternal death within 14 days of delivery. Sociodemographic and clinical factors were compared between people with and without maternal morbidity. Relative risk and 95% confidence interval for maternal morbidity was calculated using log-binomial regression, adjusted for baseline characteristics that had a significant independent relationship with maternal morbidity with a  Of 9,445 pregnant people in the analysis, 18.2% (  More than one in six nulliparas experienced the composite maternal morbidities. Maternal morbidity was associated with self-identified Black race, obesity, and multiple preexisting medical comorbidities. · One in six nulliparas experience maternal morbidity in their first pregnancy related to hypertensive disorders of pregnancy, infection, hemorrhage, and venous thromboembolism.. · Risk factors for maternal morbidity in nulliparas include Black race, prepregnancy body mass index, and preexisting medical conditions.. · The preexisting medical conditions with the strongest association with maternal morbidity included pregestational diabetes, chronic hypertension, and chronic kidney disease..

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None declared.