The effectiveness is fine: https://en.wikipedia.org/wiki/Comparison_of_birth_control_methods https://en.wikipedia.org/wiki/Comparison_of_birth_control_me... Yo

The effectiveness is fine: https://en.wikipedia.org/wiki/Comparison_of_birth_control_methods https://en.wikipedia.org/wiki/Comparison_of_birth_control_me... You don't need to have regular periods, I am not talking about the rhythm method, I am talking about fertility awareness. You accurately detect the hormonal changes which precede ovulation. It does not matter if you ovulate early or late, because you are detecting the changes that precede it, not guessing when it will happen based on days passed. And there is absolutely no doctor who will refuse to sterilize a woman whose life would be at risk from pregnancy.