So, How Reliable Is Withdrawal?

那它到底靠不靠谱？

Some people use withdrawal as a method of contraception.

有些人会用体外射精作为避孕方式

With perfect use, studies estimate withdrawal is about 96 percent effective. That means around 4 out of every 100 people may still experience an unintended pregnancy.

在“完美使用”的情况下，研究估计体外射精的避孕成功率大约是96%。也就是说，每100人中大约有4人可能会意外怀孕

For comparison, condoms are about 98 percent effective with perfect use.

相比之下，避孕套在完美使用时的成功率约为98%

So in theory, withdrawal can seem quite effective.

所以从理论上看，体外射精似乎也不算太差

But keep reading.

但请继续往下看

Ideal Conditions vs Real Life

理想和现实差很多

The 96 percent number only applies when withdrawal is done perfectly every single time.

96%的成功率只适用于每一次都完全正确执行的情况

In real life, the typical use rate drops to around 75 to 78 percent.

在现实生活中，体外射精的“典型使用”成功率只有大约75%到78%

That means roughly 1 in 5 couples relying solely on withdrawal may experience an unintended pregnancy.

换句话说，如果只靠体外射精避孕，大约每5对情侣就有1对可能会意外怀孕

So do I recommend it as a primary method?

所以我推荐它作为主要避孕方式吗？

No.

不推荐

Why Is It So Difficult?

为什么这么难做到？

Withdrawal requires strong self-control, especially at the point just before ejaculation.

体外射精需要非常强的控制力，尤其是在高潮即将来临时

Timing has to be precise.

时间必须非常精准

Also, pre-ejaculate fluid, also known as precum, can contain sperm.

而且射精前液，也就是所谓的“precum”，可能含有少量精子

The margin for error is extremely small. If timing is even slightly off, pregnancy can happen.

体外射精的容错率非常低。只要时间稍有偏差，就可能导致怀孕

What If You Want to Avoid Pregnancy?

如果你不想意外怀孕怎么办？

Use reliable contraception.

选择可靠的避孕方式

This is especially important during ovulation, when pregnancy is more likely.

尤其是在排卵期，怀孕的概率会更高

If you are already using another method, such as an IUD, withdrawal may be used as an additional backup, but not as your only protection.

如果已经在使用其他方式，比如宫内节育器 IUD，体外射精可以作为额外的辅助措施，但不应该成为唯一手段

STI Risk Still Exists

性传播感染风险依然存在

Withdrawal does not protect against sexually transmitted infections.

体外射精无法预防性传播感染

Many STIs may not show obvious symptoms, especially in men.

很多性传播感染在男性身上可能没有明显症状

If STI prevention matters to you, condoms are still one of the most effective and accessible options.

如果你在意性传播感染风险，避孕套依然是最有效且最容易获得的方式之一

Final Thoughts

小提醒

Withdrawal should be considered a last resort, not a reliable long-term strategy.

体外射精应当被视为最后的备选，而不是长期可靠的避孕策略

If avoiding pregnancy and protecting sexual health are priorities, choose a method with higher effectiveness and clearer protection.

如果你重视避孕效果和性健康安全，建议选择更稳定、效果更明确的避孕方式