Figure 1
Mean plasma oestradiol 17-β concentration in llamas injected intramuscularly with oestradiol benzoate or oestradiol cypionate. Mean plasma oestradiol 17-β (E2) concentration immediately before injection (0 h), at 1, 6, 12, 24 h post injection, and then daily until day 14 after a single intramuscular injection of 2.5 mg of oestradiol benzoate (EB group; closed circle) or oestradiol cypionate (ECP group; open circle) in llamas (n = 6/group). The broken line indicates the physiological plasma E2 concentrations upper limit established. (*)Mean values differ between groups at P < 0.05. Within treatments groups, a solid (EB group) or dashed (ECP group) arrow indicates the day on which plasma E2 concentrations returned to physiological values (P > 0.05).