Can you get pregnant on birth control?
Last updated September 3, 2026.
Yes - per OWH, even the most effective methods can fail; the real spread is between methods: IUDs and the implant fail under 1 in 100 users per year because there is nothing to remember, while the pill's failures come mostly from real-world use - late and missed doses, vomiting after a dose, rifampin and some seizure medications (most antibiotics do not reduce it - rifampin is the exception confused for the rule). Late period on birth control: test - a positive needs prompt care. And the pack insert carries exact missed-pill rules by count.
What to do
- Match the method to your real life. If remembering is hard, long-acting wins.
- Read the missed-pill rules for your pack. The instructions differ by how many were missed.
- Know the real interactions. Rifampin, some seizure meds, high-dose St. John's wort.
- Test a late period. On birth control too - and a positive gets prompt care.
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