This article compares the fertility patterns of women in consensual union and marriage in 13 Latin American countries, using census microdata from the four most recent census rounds and a methodological approach that combines the own-children method and Poisson regression. Results show that in all these countries, fertility is slightly higher within consensual union than marriage and that the age pattern of fertility is very similar in marital and non-marital unions. Further analyses show that over the period considered, childbearing within a consensual union has passed from rare to increasingly common, although not yet mainstream, for highly educated women in most countries examined. Results show that in Latin America, at least since the 1980s, women’s childbearing patterns depend on their age and on their being in a conjugal relationship, but not on the legal nature of this relationship. The similarities in reproductive behavior between marital and non-marital unions are not confined to the socially disadvantaged groups, but apply as well to the better off.