[영문]A number of dynamic factors influence the number of women (and men) eligible for, and claiming, Social Security spouse or survivor benefits at retirement. This article focuses on the marital history component of eligibility, while acknowledging that large-scale changes in women's workforce attachment over the past half century, such as increases in labor market participation and earnings relative to men, have led to an increase in the share of women retirees receiving at least part of their benefit based on their own earnings record. This article uses data from the 2001 Marital History Topical Module (wave 2) to the US Census Bureau's Survey of Income and Program Participation to examine the extent to which marital patterns are changing among different age groups of women. Results indicate that the majority of women aged 40-69 in 2001 (over three-fourths) already had marital histories that will guarantee them the option of a spouse or widow benefit at retirement.