Relationship between female body weight and ovulation rate (OR) and number of live foetuses (LF). White symbols: females from G9 and 10 from an Edinburgh selection experiment with selection on high and low lean amount (EDH, EDL, EDC=control, formerly P-lines; Brien et al. 1984). Black symbols: females from 3 growth selected lines (DU-6+LB, DU-6P, DU-6) and an unselected control line (DU-Ks), 60 females per line, G45) from the Dummerstorf growth-selection experiment (Bünger et al. 1994, 1998, data on OR and LF were taken from an unpublished research report by Bünger et al. 1987).