hi your find its 99% why your using it and your find your your research is correct. good luck
is the depo shot 99% effective per shot or 99% effective while in use? . depo has 99% effectiveness rate. i was under the impression that with each depo shot i have a 1% chance of failure. however my husband thought that the statistic really meant that while on depo (the entirety of all shots over a period of time) i have a 1% chance of failure. meaning 1 in every 100 women get pregnant while on depo. i've done research and the statistics say 3 in every 1000 women get pregnant while on depo. . so which is it? . 99% effectiveness per shot. or. 99% effectiveness while in use?