Dee ihe ga-aga n'ihu na paragraf a - N'ọnwa Maachị afọ 2007, Duggan dị afọ iri na ise si n'oche ndị na-agba bọọlụ gbagote n'asọmpị mbụ ya na mba England n'okpuru afọ iri na asaa. Kemgbe ahụ, ọ nọchitere anya England na Under-19, Under-20 na Under-23 ọkwa. Ọ gbara na FIFA U-20 Women's World Cup na 2008 na 2010
Ọ dị mma. N'ụbọchị Duggan mere afọ iri na asatọ, o nyere otu n'ime goolu abụọ n'asọmpị UEFA Women's Under-19 Championship nke afọ 2009 nke England meriri, megide Sweden na Belarus.