Representative confocal images of Type-H (Emcnhigh CD31high) vessel changes upon endothelial-specific deletion of oestrogen receptors (Esr1, Esr2, Gper1) at P28 in mice. Graphs indicate quantifications of total ECs (CD31+ CD45-Ter119-) by flow cytometry for Esr1 (Control n=11F, n=7M; Mutant n=9F, n=6M), Esr2 (Control n=4F, n=4M; Mutant n=6F, n=5M), Gper1 (Control n=6F, n=8M; Mutant n=6F, n=7M); quantification of Type-H vessel volume per field of mp for Esr1 (Control n=11F, n=7M; Mutant n=9F, n=6M), Esr2 (Control n=4F, n=4M; Mutant n=6F, n=5M), Gper1 (Control n=6F, n=8M; Mutant n=7F, n=10M); and quantification of Type-H EC area normalised to mp area for Esr1 (Control n=11F, n=7M; Mutant n=9F, n=6M), Esr2 (Control n=4F, n=4M; Mutant n=6F, n=5M), Gper1 (Control n=6F, n=6M; Mutant n=6F, n=9M). Data are mean ± s.d. for image quantification and mean ± s.e.m. for flow cytometry data; Two-Way ANOVA with Tukey’s test. Scale bars 40μm.