Segmental hypoplasia in a 13-month old gilt that was a repeat breeder with a history of recycling with discharges. The blocked nonpregnant horn caused the recycling by failure to give a pregnancy signal to it corresponding ovary. The nonpregnant horn releases prostaglandins into general circulation and lyses the CLs on both ovaries. Each horn needs 1 to 2 fetuses to maintain a pregnancy.
Evans LE (2009)