America Counts: Stories Behind the Numbers

Multiple Partners, Multiple Kids

More than 1 in 5 (21.2%) opposite-sex U.S. couples who lived together in 2021 had at least one partner who had children with multiple partners, according to a new U.S. Census Bureau report.

Having biological children with more than one partner, defined as multiple partner fertility (MPF), was common in many relationships, according to the Survey of Income and Program Participation (SIPP).

As the first nationally representative survey to directly ask a question about that topic, the SIPP is a unique resource for understanding women?s and men?s MPF.

A new?Multiple Partner Fertility Research Brief: 2021?provides an analysis of the MPF prevalence among adults generally?as well as among coresidential couples, or couples who live together.

Continue reading?to learn more about:?

• How common multiple partner fertility is among opposite-sex couples
• Married and unmarried couples and multiple partner fertility
• The Survey of Income and Program Participation

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