fertility safety 生育安全
fertility health safety 生育健康安全
fertility ability safety 生育的能力安全
fertility process safety 生育过程安全
fertility security safety 生育保障安全
By some studies, the safety nets for retirees have reduced fertility rates.
一些研究表明，退休人员的社会保障体系使生育率降低了。
The issue of fertility safety has theory and policy value.
生育安全命题具有理论和政策价值。
Fertility safety consists of fertility ability safety, fertility process safety, fertility health safety and fertility security safety.
生育安全问题包括生育的能力安全、育的过程安全、育的健康安全和生育的保障安全。
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