GSTM1 and pulmonary arterial hypertension: Multivariate logistic regression revealed that women with mild thrombocytopenia had increased odds of PPH (adjusted OR: 3.74; 95% CI: 1.36–10.30), blood transfusion (adjusted OR: 2.28; 95% CI: 1.57–3.33), and ≥4 g/dL drop in Hb level (2.99; 95% CI 1.86–4.82), compared with women with normal platelet counts.