Serum GH (A), PRL (B) and IGF-1 (C) concentrations (ng/mL, uIU/mL and ng/mL, respectively) in T1, T2 and C groups immunized with C500 (ptCS/2SS-14-asd), C500 (ptCS/2SS-28-asd) and C500 (pCpG-asd), respectively at weeks 0 (before mating), 5 (week 2 after childbirth) and 7 (week 4 after childbirth) after primary immunization. Data are presented as means ± SD. *p<0.05.