There is no consensus on the effects of a @entity1162 on neonatal outcomes. In this large Swedish population-based cohort study, our objective was to investigate prolonged second stage and risk of low Apgar score at 5 min. All nulliparous @entity1 (n = 32,796) delivering a live born singleton @entity1 in cephalic presentation at >= 37 completed weeks after spontaneous onset of labor between 2008 and 2012 in the counties of Stockholm and Gotland were included. Data were obtained from computerized records. Exposure was time from fully retracted cervix until delivery. Logistic regression analyses were used to estimate crude and adjusted odds ratios (ORs) with 95% confidence intervals (CIs). Adjustments were made for maternal age, height, BMI, smoking, sex, gestational age, sex-specific birth weight for gestational age and head circumference. Epidural analgesia was included in a second model. The primary outcome measure was Apgar score at 5 min <7 and <4. We found that the overall rates of 5 min Apgar score <7 and <4 were 7.0 and 1.3 per 1000 births, respectively. Compared to @entity1 with <1 h from retracted cervix to birth, adjusted ORs of Apgar score <7 at 5 min generally increased with length of second stage of labor: 1 to <2 h: OR 1.78 (95% CI 1.19-2.66); 2 to <3 h: OR 1.66 (1.05-2.62); 3 to <4 h: OR 2.08 (1.29-3.35); and >= 4 h: OR 2.71 (1.67-4.40). We conclude that @entity1162 is associated with an increased risk of low 5 min Apgar score.

XXXX is associated with low Apgar score.

@entity1 :: ('9606', 'Species') :: ['infant', 'women'] @entity1162 :: ('MESH:D008133', 'Disease') :: ['prolonged second stage of labor']
@entity1162 :: (MESH:D008133,Disease) :: ['Prolonged second stage of labor']
