list any two structural changes seen in the uterine wall every month to receive the embryo for implantation.
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every month we know means girls undergo the menstrual cycle and if there is no fertilization takes place with the ovum of the sperm then the endometrium layer will degenerate and liquid means blood Will flow outside,but f means fertilization takes place then and there will not degenerate and it will implant the embryo there and another one is that during this time the oestrogen hormone will be at its peak level means to maintain the endometrium layer and to implant embryo there
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1) The blood flow towards the uterus increases.
2) The uterine wall becomes more thick and spongy
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