CRP and preterm premature rupture of the membranes: Monochorionicity, use of ART, previous invasive procedure or foetoscopy, gestational age at PPROM and delivery, severe oligohydramnios, cervical length, IUFD of one twin, CRP, and leucocytosis (defined as WBC count > 11.0 × 109/L) at admission were evaluated as independent factors for perinatal mortality or achieving periviability.