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by IanCal
4473 days ago
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> So after about 100 years of using this method, you've got a .4% chance of becoming pregnant. Seems like decent odds to me. No, after one year you've got a 0.4% chance of being pregnant. Assuming this stays steady over 100 years, you'd have a 33% chance of being pregnant (1 - (0.996 ^ 100)) Their maths for a 1.8% failure rate over 10 years is right, it's about 15%. |
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