This study was a retrospective and case-controlled study that included 12073 pregnant women over 35 years-of-age and gave birth in Hangzhou, China between 2018 and 2022. We investigated the perinatal
Objective: Optimal management of twin deliveries is controversial. We aimed to assess if intertwin delivery interval, after vaginal delivery of the first twin, may have an influence on adverse neonata
Hainan Province is located in southern China and, compared with other provinces, differs markedly in climate, environment, economy, culture, and dietary habits. Local residents also show distinct patt
