Could I be pregnant?

Patient : I am a faithful oral birth control taker but a week after having unprotected sex I started antibiotics and now I'm about 3 days late for my period. Could I be pregnant bc of the antibiotics affecting my birth control?
Symptoms:  Late period
Doctor :   Hello, Thanks for contacting It is a known fact that that antibiotics decrease the effect of of contraceptive pills and if one starts antibiotics and is on contraceptive pills then a back method should be used like barrier contraception to prevent contraceptive failure. However in your case, you started antibiotics a week after having sex so the likely hood of sperms having fertilised the ovum during protection of pills is unlikely. Nevertheless, to confirm or rule out pregnancy one must wait for 7 days post missed periods and perform a urine pregnancy test which can confirmatively provide results. The delay in menses could be secondary to the use of antibiotics as well. so suggestion is to wait for 7 days and perform a urine pregnancy test. I hope i have answered your query in detail. wishing you best of health, regards

Related Q&A

Q: Hi, am having a crypic pregnancy. I am about 31 fetal weeks, 33 gestational weeks. I am now having.daily Braxton hick...

Q: Can I take Tylenol when pregnant? I am a 32 year old women who is 28 weeks pregnant. I've had some massive splitting ...

Q: Insulin does not cross the placenta but glucose does, how will the baby’s body handle elevated glucose in the m...

Q: Is it possible to get pregnant while on the implanon? And if so, would the fetus survive or would it die with the imp...

Q: I have been on BCP for a while..It it normal to still breakthrough bleed? The blood is dark red to brown what can I d...


Dr. James Obaji M.D.

  • 247 Reviews
  • Family Physician

Dr. Suneel Sharman M.D.

  • 190 Reviews
  • Family Physician

Dr. Pat Golden M.D.

  • 169 Reviews
  • Cardiologist

Dr. Kunaal Jindal M.D.

  • 112 Reviews
  • Plastic Surgeon