Cell Proliferation; Gene Expression Regulation, Developmental; Liver/embryology; Protein Biosynthesis; Ribosomal Proteins/genetics; Signal Transduction/genetics; Animals; Cell Proliferation/drug effects; Eating; Eukaryotic Initiation Factor-4A/genetics; Eukaryotic Initiation Factor-4F/genetics; Eukaryotic Initiation Factor-4G/genetics; Female; Food Deprivation; Gene Expression Regulation, Developmental/drug effects; Gestational Age; Hepatectomy; Liver/drug effects; Liver/enzymology; Liver/surgery; Liver Regeneration/genetics; Male; Pregnancy; Protein Biosynthesis/drug effects; Protein Kinases/metabolism; Protein Synthesis Inhibitors/pharmacology; RNA 5' Terminal Oligopyrimidine Sequence; RNA, Messenger/metabolism; Rats; Rats, Sprague-Dawley; Ribosomal Protein S6/genetics; Ribosomal Proteins/metabolism; Signal Transduction/drug effects; Sirolimus/pharmacology; TOR Serine-Threonine Kinases; Time Factors