what are the chances of getting pregnant from precum while on birth control?

I get pregnant from pre-cum if I’m on the pill?
By Kendall @ Planned Parenthood | June 15, 2011, 9:04 p.m.
Category: Birth Control
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Is it likely to get pregnant from pre-cum on the pill if you have taken it correctly?
The pill is up to 99.7% effective at preventing pregnancy, when it’s