The aim of the experiment was to determine if there were differences in VEGFA, VEGFR1, and VEGFR2 mRNA expression in uterine endometrium and myometrium tissues from different stages of adenomyosis (two experimental groups of stages 1–2 and 3–4) as compared with tissue with normal histology (control experimental group, Fig. 1b). Here, KDR is linked to adenomyosis.