Comprehensive Chinese-English Dictionary

一胎率 [yìtāilǜ]

1. 1. proportion of first-borns to total number of births during the same period, esp. important in China's one-child family policy

   上海去年出生的孩子，一胎率为85.1%。

   85.1% of the babies born in Shanghai last year were first-borns.

   从今年开始要统计农村的一胎率。