Hi Kate, Polyps are an over-growth of the endometrial lining of the uterus. They can recur, and can appear during IVF treatment cycles due to the higher levels of oestrogen as a consequence of stimulating your ovaries to increase the number of eggs collected.
We hope this helps answer your question. If you would like to discuss this matter further with our team, please do call us on 0161 300 2737 to arrange a consultation.