My large meluna leaks. I have been using it for a few cycles now. I have noticed that when inserted the posterior side is pushed in somewhat, even though it has "popped". The cup is not full when it leaks, although, it usually only leaks the first three days of my cycle . I am fairly sure it is inserted correctly. Meluna sent me a complimentary medium which also leaked, but it is the same diameter. I am suspecting it may be too large, but this is my first cup. Any suggestions on possible causes would be great. If it does appear that the cup is too large I need advice on what diameter would be good. I am 26 and have had two vaginal deliveries. Would it be possible to fit a small meluna? I am somewhat partial to the meluna because I like the ball stem. Ultimately, I am most interested in getting this leakage under control.