Abstract

Current evidence of the maternal, perinatal and neonatal outcomes in twin pregnancies among mothers with advanced age is unclear, especially for mothers with age above 40 years. A systematic search was conducted using the PubMed, Scopus, and Google Scholar databases. Studies that were observational in design or analysed retrospective data were considered for inclusion. The included studies had to be conducted in twin pregnancies and should have documented the effect of maternal age on obstetric and/or neonatal outcomes. Statistical analysis was performed using STATA software. A total of 20 studies were considered for inclusion. All the studies were based on retrospective data. Compared to mothers aged under 40 years, those with advanced age (≥40 years) had increased risk of caesarean delivery [RR 1.20, 95% CI: 1.05, 1.37], gestational hypertension [RR 2.71, 95% CI: 1.72, 4.27], gestational diabetes mellitus [RR 2.03, 95% CI: 1.28, 3.21], preterm birth [RR 2.47, 95% CI: 1.09, 5.80], neonatal admission to intensive care unit [RR 1.78, 95% CI: 1.21, 2.64] and perinatal and/or neonatal mortality [RR 5.76, 95% CI: 1.11, 29.7]. The risk of gestational diabetes mellitus [RR 1.52, 95% CI: 1.21, 1.90] and having caesarean delivery [RR 1.19, 95% CI: 1.10, 1.28] was higher in mothers with ≥35 years of age, compared to those <35 years. There were no significant differences in the risk of adverse neonatal outcomes among the mothers with age ≥35 years. However, in these mothers, the risk of perinatal/neonatal mortality [RR 0.82, 95% CI: 0.76, 0.88] was comparatively lower than in mothers under 35 years of age. There appeared no significant risk of advanced maternal age for postpartum haemorrhage, hospitalization during pregnancy and premature rupture of membranes. The increased risk of maternal, neonatal and perinatal outcomes in mothers with advanced age highlights the need for close follow-up, early detection and management of medical complications in twin pregnancies.

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