Fig. 2.
Comparison of endometrial biopsies from subfertile and fertile patients, taken during the mid-secretory phase. Immunohistochemical stains on paraffin-embedded tissue sections. The scale bar represents 100 µm. a β 3 integrin: negative glands and a weakly positive stromal reaction in endometrial biopsies from subfertile patients. b β 3 integrin: positive-stained glands and a weakly positive stromal reaction in endometrial biopsies from fertile patients. c Leukemia inhibitory factor (LIF): negative glands and a weakly positive stromal reaction in endometrial biopsies from subfertile patients. d LIF: positive-stained glands and a weakly positive stromal reaction in endometrial biopsies from fertile patients. e Vascular epithelial growth factor (VEGF): negative glands and weakly positive surface epithelium, with some positive-stained stromal cells in endometrial biopsies from subfertile patients. f VEGF: positive-stained glands and weakly positive stromal cells in endometrial biopsies from fertile patients.