"i have had the mirena in for almost five years - this has been the best for quality of life. i used to be very unwell with endometriosis for many years - now i don&#039;t even get a period. i am 25 and without children. i have had some slight side effects of slight weight gain and loss of libido - however these i keep in check with exercise and an understanding partner. worked for me - hope it can for you."