"It is thought to occur as a result of excessive oestrogen production from the fetal ovaries under HCG stimulation."
"Rarely a congenital epulis may be detected on antenatal ultrasound as an intra-oral mass. Colour and power Doppler ultrasound examination may show marked blood flow within the tumour 5."
"The histogenesis is uncertain, and proposed cells of origin include odontogenic epithelium, undifferentiated mesenchymal cells, pericytes, fibroblasts, smooth muscle cells, nerve-related cells, and histiocytes."