Marital delay and fertility decline are reshaping the institution of the family. Large proportion of American adults in the prime family-building years are unmarried.  Even those with the best economic prospects express concerns about attaining the necessary prerequisites for marriage and parenthood.  Professional women are especially concerned about balancing work and family demands.  We explore the family desires and intentions of a racially diverse sample of recent college graduates who obtained degrees in STEM fields in 2015 and 2016, drawing on in-depth interviews collected in the first and third year post-graduation (n = 73). Only about two thirds of our respondents expressed consistent desires for marriage at both interviews; we find no notable gender differences in anticipations for marriage.  But an even larger proportion express ambivalence or do not intend to become parents in the future, and men more often state a disinclination for parenthood.