Figure 2.

Change in plasma immunoglobulins (U ml⁻¹) in relation to in ovo androgen treatment within 48 h after experimental challenge (n=23 nests), (a) PBS (control-challenge; n=11 nests) (b) lipopolysaccharides (LPS from E. coli) challenge (n=12 nests). Chicks were 7(±2) days old at the day of injection. Initial plasma immunoglobulin concentrations were 35 415 U ml⁻¹ (control-chicks) and 41 066 U ml⁻¹ (androgen-chicks), respectively.