Pregnancy Outcomes of Women with a Third Parity in Southwest China

Abstract

Abstract Background: Fertility is a topic of concern in every country, and all the countries are advocating fertility and improving their fertility policies. The aim of this study was to investigate the effects of parity on pregnancy outcomes, and provided reasonable prevention and intervention of risk factors to reduce the incidence of adverse maternal and infant pregnancy outcomes. Methods: A total of 1,200 women were randomly selected by parity and they were divided into three groups. The pregnancy outcomes of the three groups were compared by using Partition of Chi-square. Logistic regression was conducted to estimate the association between parity and pregnancy outcomes after adjusting for other confounding influencing factors. Results: Age (28.82 ± 4.01 vs 32.33 ± 4.30 vs 33.80 ± 4.49), BMI (26.31 ± 3.04 vs 27.08 ± 3.17 vs 27.57 ± 3.36), gestational weeks (39.13 ± 1.67 vs 38.70 ± 1.71 vs 38.36 ± 1.82), days from admission to delivery (0.89 ± 1.20 vs 0.89 ± 1.28 vs 1.13 ± 1.18), scar uterus (0.8% vs 37% vs 62%), fertilization way, and delivery way were significantly different among the three groups of women. Multi parity is a risk factor for the occurrence of preterm birth (OR = 1.602, 95% CI: 1.181–2.173), perinatal anemia (OR = 1.468, 95% CI: 1.099–1.963), and uterine rupture (OR = 2.752, 95% CI: 1.261–6.007). It is a protective factor for low birth weight (OR = 0.564, 95% CI: 0.321–0.992), amniotic fluid turbidity (OR = 0.556, 95% CI: 0.418–0.739), and fetal distress (OR = 0.171, 95% CI: 0.080–0.365) (P < 0.05). Conclusion: Multi parity is not an independent risk factor for adverse pregnancy outcomes, but mostly combined with scar uterus, advanced age, obesity, IVF, and other risk factors that lead to adverse pregnancy outcomes. Strictly controlling the indications of cesarean section, early fertility, and reasonable weight gain during pregnancy are the most effective measures to prevent adverse pregnancy outcomes after the opening of the three-child policy in China.