Matteo Boretto, the first author on this study, commented that «we were very excited to see that we could not only robustly grow and amplify
endometrial tissue in a dish, but that the tiny structures were also able to reproduce
normal responses of the endometrium to hormones: oestrogen makes the tissue thicken, progesterone then induces maturation including folding (see picture), and subsequent removal of both hormones mimics the
cell shedding of the menstrual period.»