Marriages connected with first births among cohabiting women in the Danish fertility survey of 1975

The conditional probability of marrying during the seven calendar months before or after a first birth, given that a women bears her first child in the first few years after initiating a consensual union and has not already converted the union into a marriage, is suggested here as a measure of the birth-connected marriage propensity. This propensity has fallen dramatically in data for Danish cohorts of women interviewed in 1975. The fall is partly a consequence of a strong decrease in nuptiality among unwed mothers.