Is the diaphragm an effective type of contraception?
Yes, a diaphragm is indeed an effective form of contraception – if spermicidal cream is always applied before sexual intercourse, and if the device is left in the vagina for six to eight hours after the intercourse has finished. If used correctly, the diaphragm is generally reckoned to be 92 to 96 per cent effective against pregnancy. Obviously, the pregnancy rate is higher if it is not used properly. But it is lower if you’re in your late 30s or your 40s – which is when many women use it.