...O. Mayo; G.R. Bishop; T.W. Hancock The genetics of human family size is not readily susceptible to analysis. Some of the problems in its investigation are discussed, together with methods for overcoming them. In particular, the problem of obtaining a satisfactory model which will account for both...

...O. Mayo; M.M. Nelson; J.O. Forfar Data on family size distribution and inheritance are presented. Variance in sibship size is in general greater than mean sibship size. The inherited component in the variation appears in general to be small, though not in a Scottish sample examined in more detail...