Recent studies by economists have focused on cultural transmission from the origin country rather than the origin family. Our paper extends this research by investigating how family-specific'cultural transmission' can affect fertility rates. Following Machado and Santos Silva [Journal of the American Statistical Association (2005) Vol. 100, p. 1226] and Miranda [Journal of Population Economics (2008) Vol. 21, p. 67], we estimate count data quantile regression models using the British Household Panel Survey. We find that a woman's origin-family size is positively associated with completed fertility in her destination family. A woman's country of birth also matters for her fertility. For a sub-sample of continuously partnered men and women, both partners' origin-family sizes significantly affect destination-family fertility.