Wyshak G
Am J Epidemiol. 1975 Aug;102(2):170-8. doi: 10.1093/oxfordjournals.aje.a112144.
A review of studies on twinning has shown that dizygotic (DZ) twinning rates among women from general populations characteristically peak at ages 35-39, then decline sharply. Analysis of genealogical data from the Archives of the Mormon Church indicates that women who are dizygous twins themselves or the sibs of dizygous twins have a higher twinning rate among their offspring than do women from the general population. The dizygotic twinning rates of women who are twins or the sibs of twins classified by maternal age also peak at ages 35-39 but remain high at ages 40-44, then decline. It is well known that Negro women have high DZ twinning rates; a less well knwon finding is that the DZ twinning rates of Negro women also remain high after age 39. It has been suggested that high DZ twinning rates at later maternal ages may be related to a delayed age at menopause; However, published reports on age at natural menopause and analysis of our data from contemporary white US women indicate the contrary; Women who have borne unlike-sexed (DZ) twins and Negro women have a lower age at natural menopause then do white women from general populations, and a lower age in comparison with women who have borne like-sexed twins.
一项关于双胞胎的研究综述表明，普通人群中女性的异卵双胞胎（DZ）出生率通常在35 - 39岁达到峰值，然后急剧下降。对摩门教档案馆的家谱数据进行分析表明，自身为异卵双胞胎或异卵双胞胎兄弟姐妹的女性，其后代的双胞胎出生率高于普通人群中的女性。按母亲年龄分类的双胞胎或双胞胎兄弟姐妹的女性的异卵双胞胎出生率在35 - 39岁也达到峰值，但在40 - 44岁时仍保持较高水平，然后下降。众所周知，黑人女性的异卵双胞胎出生率较高；一个不太为人所知的发现是，黑人女性的异卵双胞胎出生率在39岁以后也仍然很高。有人提出，母亲年龄较大时异卵双胞胎出生率较高可能与绝经年龄延迟有关；然而，关于自然绝经年龄的已发表报告以及我们对当代美国白人女性数据的分析表明情况恰恰相反；生育了不同性别的（异卵）双胞胎的女性和黑人女性的自然绝经年龄低于普通人群中的白人女性，并且与生育了同性双胞胎的女性相比年龄更低。
