FIG. 3.

Mean daily plasma progesterone values in experiment 4 (A) for nonstress control (closed circles) and stress ewes (open circles), and in experiment 5 (B) for nonstress control (closed circles), diet-only (gray circles), and diet-plus-stress (open circles) ewes. The period of stress is depicted at the top of each panel. In experiment 4 (A), values from one stress ewe that expressed an abnormal luteal phase in cycle 3 were excluded. In experiment 5 (B), values were excluded once ewes ceased to express estrous cycles. In experiment 4 (A), n = 5–6 ewes/group, and in experiment 5 (B), n = 5–8 ewes/group.