Landry D J, Forrest J D
Alan Guttmacher Institute, USA.
Fam Plann Perspect. 1995 Jul-Aug;27(4):159-61, 165.
One in every six U.S. birth certificates have no information on the age of the baby's father; for more than four in 10 babies born to adolescent women, no data are available on the father's age. Information from mothers aged 15-49 who had babies in 1988 and were surveyed in the National Maternal and Infant Health Survey indicates that fathers for whom age is not reported on the birth certificate are considerably younger than other fathers. In 1988, 5% of fathers were under age 20, and 20% were aged 20-24. Fathers typically are older than mothers, especially when the mothers are teenagers. Fathers who are unmarried, black or partners of lower income women are younger than other fathers.
每六份美国出生证明中就有一份没有关于婴儿父亲年龄的信息；在青少年女性所生的婴儿中，超过十分之四没有父亲年龄的数据。1988年生育并参加全国母婴健康调查的15至49岁母亲提供的信息表明，出生证明上未报告年龄的父亲比其他父亲年轻得多。1988年，5%的父亲年龄在20岁以下，20%的父亲年龄在20至24岁之间。父亲通常比母亲年龄大，尤其是当母亲是青少年时。未婚、黑人或低收入女性伴侣的父亲比其他父亲年龄小。
