Fig. 2
From: Review of the impact of heat stress on reproductive performance of sheep
Impacts of heat stress of rams before mating on sperm morphology, and fertilisation and pregnancy and lambing rates after mating to non-heat stressed ewes. Timing of normothermic (blue) and hyperthermic (orange) temperatures is shown for each treatment. CON, Control; HS, Heat stress; rh, relative humidity; ND, Not determined; *indicates significant difference from control group; arrows indicate range of timing of heat stress prior to semen collection for mating (data derived from [83, 84, 86, 92])