<prompt> Beta HCG is secreted byOvaryPituitaryCorpus luteumPlacenta  <response>: In molecular biology, human chorionic gonadotropin hCG is a hormone produced by the syncytiotrophoblast, a component of the feilized egg, after conception. Following implantation, the syncytiotrophoblast gives rise to the placenta.Ref: Ganong;s review of medical physiology; 24th edition; page no:-414 