Ghrelin As An Ontogenetic Factor And A Gastrointestinal Hormone In The Prenatal And Postnatal Period In Rat Journal title: IOSR Journal of Dental and Medical Sciences (IOSR-JDMS) Authors: Nadya Penkova, Pepa Atanassova, Elenka Georgieva, Monika Chilikova Subject(s):