Immunostaining for LGR7 epitopes (L7-1) in the endometrium of the marmoset monkey. A, day 4 follicle phase. B, day 7 follicle phase. C, day 8 follicle phase, following administration of a single ovulatory dose of hCG. D, From another animal as in C, showing a larger overview. E, day 3/4 of the luteal phase, overview. F, As in E, detail. G, day 9 luteal phase. H, negative control using preimune serum: day 8/9 of the follicle phase after application of hCG. I, negative control, day 3/4 of the luteal phase. Scale bars in all figures represent 50 μm.