Sow in Estrus.
Yorkshire sow in estrus responding to teasing by standing immobile with erect ears.
Evans LE (2009)
Sow in Estrus.
Hampshire sow in estrus responding to teasing by standing immobile with erect ears.
Evans LE (2009)
Woodlot Breeding.
Sow in estrus seeking out the boar [in the upper left hand corner] in a woodland lot.
Evans LE (2009)
Estrus Detection.
Boar checking for evidence of heat by pheromones.
Smith MC (2011)
Heat Detection for A.I.
Red color marking denotes that the sow has shown signs of heat today, the blue color was for yesterday.
Smith MC (2010)
Heat Detection for A.I.
Record keeping directly on the sow. These sows have been inseminated artificially (AI) or bred by the B boar. The records are transcribed at the end of the week.
Smith MC (2010)
Heat Detection for A.I.
Record keeping directly on the sow. This sow has been inseminated artificially after several N days when not in heat.
Smith MC (2010)
