The process pertaining to the initial formation of the mammary gland from unspecified parts. The process begins with formation of the mammary line and ends when the solid mammary bud invades the primary mammary mesenchyme. [GOC:dph, PMID:16168142, PMID:17120154]
Full description or abstract
Collection
C5: Ontology GO: Gene Ontology GO:BP: GO Biological Process