泰米尔纳德邦的双胞胎出生率。
Twinning rates in Tamilnadu.
作者信息
Rao P S, Inbaraj S G, Muthurathnam S
出版信息
J Epidemiol Community Health. 1983 Jun;37(2):117-20. doi: 10.1136/jech.37.2.117.
A prospective study of human reproduction was conducted in Tamilnadu State, South India, from 1969 to 1975. This paper reports twinning rates and relates these to maternal age, parity, and consanguinity. Birth weights and other dimensions at birth and infant mortality are also studied. The overall twinning rate was 1 in 115 births. Dizygotic twinning rates increased significantly with maternal age and parity. The measurements at birth for like-sexed twin pairs were lower than that of unlike-sexed, but the mortalities did not differ significantly. Twins, in general, had a several fold increase in mortality as compared with singletons.
1969年至1975年期间，在印度南部的泰米尔纳德邦开展了一项关于人类生殖的前瞻性研究。本文报告了双胎率，并将其与产妇年龄、产次和血缘关系进行了关联分析。同时还研究了出生体重、出生时的其他身体指标以及婴儿死亡率。总体双胎率为115例出生中有1例双胎。异卵双胎率随产妇年龄和产次显著增加。同性双胞胎出生时的各项测量指标低于异性双胞胎，但死亡率无显著差异。一般来说，双胞胎的死亡率比单胎高出几倍。
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