Impact of NPD, LPD and MD-LPD on male growth (A), gonadal fat weight (B) gonadal fat:body weight ratio (C), testis weight (D) testis:body weight ratio (E), serum testosterone (F), late gestation litter size (G) and fetal weight. Data are mean ± s.e.m. in A–G and mean (solid line) with 25 and 75% quartiles (dashed lines) in H. n = 8 males per dietary group in A–G and eight litters (each from separate males) representing an n of 52–59 fetuses per treatment group in H. Data were analysed by one-way ANOVA followed by Bonferroni post-hoc test, or Kruskal–Wallis test with Dunns multiple comparison test where appropriate. *P < 0.05, **P < 0.01, ***P < 0.001.