Temporal trends in the birth rates and perinatal mortality of twins: A population-based study in China.

ABSTRACT:

Objective

Until now, little was known about the epidemiological characteristics of twins in China due to a lack of reliable national data. In this study, we aimed to analyze temporal trends and perinatal mortality of twins from China.

Methods

Data on twins between 2007 and 2014 were obtained from the China National Population-Based Birth Defects Surveillance System. Twin and singleton deliveries after at least 28 weeks of gestation were recruited and followed until postnatal day 42. Twinning rates were defined as the number of twin individuals per 1000 births(stillbirths and live births). The Weinberg's differential method was utilized to estimate the number of monozygotic and dizygotic twins.

Results

During 2007-2014, the twinning rate increased by 32.3% from 16.4 to

SUBMITTER: Deng C 

PROVIDER: S-EPMC6334899 | biostudies-literature | 2019

REPOSITORIES: biostudies-literature