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Is It Possible To Get Pregnant Post Unprotected Sex Despite Being On Birth Control?

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Posted on Tue, 3 Feb 2015
Question: So my girlfriend has been taking birth control for a few months now. Last month we had uprotected sex. She also had missed the pill 1 day but had retaken the pill at 9 a.m. the next morning. On the day her period was to begin she had cramps. But no blood. The following day brow. Discharge with small amount of blood was found. This was consistent for that day and the next for a total of 2 days. After that nothing. No cramps. No bleeding. No brown. No pain. Nothing. It's been a week and still nothing. Could this be implantation bleeding?. A light period?? Could she be pregnant?? We are very scarred and constantly stressing over the idea. It's become an unhealthy stress. She is very scared to take a test. We need help. Please.
doctor
Answered by Dr. Dattaprasad (1 hour later)
Brief Answer:
Pregnancy highly unlikely.

Detailed Answer:
Hi,
Welcome to HCM.
Pregnancy appears to be highly unlikely if she was taking combined oral contraceptive pills containing estrogen>0.02mg. These pills are highly effective and provide >95% protection from pregnancy. Though she had forgotten one pill, she had followed proper procedure to compensate for that (taking pill next morning), so pregnancy is highly unlikely. The bleeding could be scanty menses/ withdrawal bleed.
Chance of pregnancy though <1%, can be easily ruled out by doing one home pregnancy test.
I can understand the stress through which you are going, but its better to kill the stress for once & all by doing one pregnancy test rather than living with stress. So please do one home pregnancy test if the event of missing pill had happened >3 weeks ago. If it happened <3 weeks ago, pregnancy test may not give true result & you will need to wait for few more days.
Hope this helps you.
Kindly get back if you have any other concerns.
Regards.
Above answer was peer-reviewed by : Dr. Shanthi.E
doctor
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Follow up: Dr. Dattaprasad (15 hours later)
Would the test show positive or negative if it were to be corrupted by the missing of the pill?
doctor
Answered by Dr. Dattaprasad (5 hours later)
Brief Answer:
Missing pill doesn't alter result.

Detailed Answer:
Hi,
Welcome back.
Missing pill is not going to alter the result of test. You need not worry for that.
As I already told, chance of pregnancy is negligible. Its to be done to reduce your anxiety.
Regards.
Above answer was peer-reviewed by : Dr. Shanthi.E
doctor
Answered by
Dr.
Dr. Dattaprasad

Infertility Specialist

Practicing since :2002

Answered : 673 Questions

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Is It Possible To Get Pregnant Post Unprotected Sex Despite Being On Birth Control?

Brief Answer: Pregnancy highly unlikely. Detailed Answer: Hi, Welcome to HCM. Pregnancy appears to be highly unlikely if she was taking combined oral contraceptive pills containing estrogen>0.02mg. These pills are highly effective and provide >95% protection from pregnancy. Though she had forgotten one pill, she had followed proper procedure to compensate for that (taking pill next morning), so pregnancy is highly unlikely. The bleeding could be scanty menses/ withdrawal bleed. Chance of pregnancy though <1%, can be easily ruled out by doing one home pregnancy test. I can understand the stress through which you are going, but its better to kill the stress for once & all by doing one pregnancy test rather than living with stress. So please do one home pregnancy test if the event of missing pill had happened >3 weeks ago. If it happened <3 weeks ago, pregnancy test may not give true result & you will need to wait for few more days. Hope this helps you. Kindly get back if you have any other concerns. Regards.