In general, inbred individuals tend to be at increased risk of sterility as shown in cows (Gonzales-Recio, 2007) or in leghorns (Nordskog and Cheng, 1988) for examples. I only have very quickly looked at a few abstract but it seems that this effect is a bit controversial in humans with two studies showing a negative relationship between consanguinity and sterility (Rao and Inbaraj, 1979; Bittles et al., 2009) and one showing a positive relationship (Ober et al., 1999).
What is the relationship between the inbreeding coefficient $F$ and the (relative or absolute) risk of sterility in humans?
I am looking for some function, linear or not, that describes the probability of being sterile ($P_s$) as a function of the inbreeding coefficient $F$ in humans. I am aware such measure might differ among human populations but I'll be interested in whatever we can find.