idess 26 6 40 Periodic abstinence 25 63 Calendar 9 Ovulation Method 3 Sympto-thermal8 2 Post-Ovulation 1 Cap' Parous Women 40 26 42 Nulliparous Women 20 9 56 Sponge Parous Women 40 20 42 Nulliparous Women 20 9 56 Diaphragm' 20 6 56 Withdrawal 19 4 Condoms Female (reality) 21 5