See our birth control comparison for the full effectiveness landscape — these two methods have the widest gap between typical-use and perfect-use effectiveness of any method on that list, which tells you something important about what they actually require to work well.
Withdrawal
Withdrawing the penis before ejaculation. Commonly cited figures put typical-use failure around 20%, dropping to roughly 4% with genuinely perfect, consistent execution — every single time, correctly, with no exceptions made under any circumstances. Part of why even "perfect" use isn't as protective as it sounds: pre-ejaculate can carry viable sperm, covered in detail in our ejaculation guide, meaning correct timing on ejaculation itself doesn't fully eliminate risk.
Fertility awareness methods
This isn't one method — it's a category covering several distinct approaches: tracking basal body temperature, cervical mucus changes, calendar/cycle timing, or combining multiple indicators together (often called symptothermal methods). Effectiveness varies a lot by which specific approach is used and how rigorously — commonly cited failure rates range from around 2% to 23% in typical use depending on the method, with the more structured, multi-indicator approaches performing meaningfully better than simple calendar counting alone.
What actually makes these work well, when they do
Both require consistent, correct execution with essentially no margin for error — that's the core tradeoff for choosing a method that doesn't involve hormones, devices, or procedures. For fertility awareness specifically, proper training (often through a certified instructor rather than an app alone) and combining multiple fertility indicators rather than relying on just one tend to meaningfully improve real-world effectiveness. For withdrawal, effectiveness depends heavily on experience, self-control, and consistency — none of which are things to assume will hold up reliably under all circumstances.
Frequently asked questions
How effective is pulling out, actually?
Commonly cited figures put typical-use failure around 20%, dropping to about 4% with perfect, consistent use — meaning withdrawing before ejaculation every single time, correctly, with no exceptions. The gap between those numbers is large because the perfect-use version is genuinely hard to execute consistently, and pre-ejaculate can carry sperm regardless of timing.
Why does fertility awareness effectiveness vary so much?
Because "fertility awareness methods" covers several distinct approaches — tracking temperature, cervical mucus, cycle timing, or a combination — with different levels of rigor and evidence behind them. The more structured, evidence-based methods (typically combining multiple indicators) perform meaningfully better than simple calendar counting alone.
Do these methods protect against STIs?
No — neither withdrawal nor fertility awareness methods provide any STI protection, since neither involves a barrier. If STI risk is a factor, condoms are needed regardless of which pregnancy-prevention method is also being used.
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