Not everyone can get on with a coil, Mirena or Copper. I had a Mirena coil, and fell pregnant with DS2 while it was in (I also had the implant AT THE SAME TIME). After his birth, I had a copper coil fitted. It dislodged, and I ended up with a tear in my womb and an operation to fix that.
So a coil doesn't work for everyone!
I was using condoms with my ex-P, and one had obviously split, but considering I was checking them rigorously after each time we used one, and was taking the MAP if they had any evidence of a split, it is a mystery to me how I fell pregnant with my DS3!
I fell pregnant on microgynon, taken properly, while using a condom, which split, and I took the MAP. I STILL managed to conceive my first DC, DD.
I fell pregnant with my second DC, DS1, while 6 weeks into the depoprovera injection that is meant to last 12 weeks.
I am allergic to spermicide, so a diaphragm is not suitable.
My PCT were refusing to sterilise me as they deemed me 'too young'. I first asked whilst still pregnant with my second DC. 10 years ago. I have had two DC's since I first asked to be sterilised. I couldn't go through with terminations, despite booking them at first. I love all 4 of my DC's to the moon and back, but I do NOT want any more.
My ONLY options for failsafe contraception were my Ex getting a vasectomy, or me using abstinence as a form of contraception.
That is not me trying to control someone else's body - it is ME controlling what happens to MY OWN body.