"so yes it&#039;s effective, but never get this shot. i had it 3 times (9 months) worst nine months of my life. constant spotting and bleeding, never was able to go on the boat because i didn&#039;t have enough bleeding for a tampon but would bleed threw a bathing suit, felt very uncomfortable and always had to think about if i was bleeding, never wore white bottoms or pants. it was the worst experience of my life. if you see this dont take the shot."