Preterm birth rates in Japan from 1979 to 2014: Analysis of national vital statistics.

Soyoko Sakata Shoko Konishi Chris Fook Sheng NgChiho Watanabe

Published in: The journal of obstetrics and gynaecology research (2017)

The rates of preterm birth among mothers aged in their 20s and early 30s increased between 1979 and 2014, which contributed to the secular increase in rates of preterm birth at < 37 weeks.

Keyphrases

preterm birth
gestational age
low birth weight
quality improvement