We ask because it affects some safety checks (for example pregnancy).
Emergency contraception is available to anyone who needs it, but for under-16s we need a pharmacist conversation first.
This decides which option can work, or whether a coil is the better choice.
These can stop emergency contraception working properly.
We use this to work out your BMI. Choose the units you know.
Your BMI is worked out automatically and checked by the pharmacist.