Any process that activates or increases the frequency, rate or extent of vitellogenesis. [ GOC:mr http://www.ncbi.nlm.nih.gov/pubmed/19467235 http://purl.obolibrary.org/obo/go/references/0000058 GOC:TermGenie ]
Synonyms: up-regulation of vitellogenesis up regulation of yolk production up regulation of vitellogenesis upregulation of yolk production up-regulation of yolk production upregulation of vitellogenesis positive regulation of yolk production