After ovulation the dominant follicle collapses in on itself and blood vessels within the Theca layer are ruptured causing haemorrhage within the follicle. The blood forms a clot, the distinguishing feature of a Corpus Haemorrhagicum. | After ovulation the dominant follicle collapses in on itself and blood vessels within the Theca layer are ruptured causing haemorrhage within the follicle. The blood forms a clot, the distinguishing feature of a Corpus Haemorrhagicum. |