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When to take a pregnancy test after unprotected sex?

This Premium Q&A, reviewed and published, features a real conversation between an iCliniq user and a physician.

Patient's Query

Hi doctor,

Is it safe to take a pregnancy test 15 to 17 days after unprotected sex? I had sex and used the withdrawal method, but I am afraid that some sperm slid down towards my vagina. I took a pregnancy test, but I am afraid that the results were inaccurate. I took birth control, but only after unprotected sex. My ovulation was already done when we had sex. I am still scared. I want to know if my pregnancy test will be accurate tomorrow.

Thanks.

Hi,

Welcome to icliniq.com.

I can understand your concern.

Yes, taking a pregnancy test 15 to 17 days after unprotected sex should give you a fairly accurate result. By this time, if you were pregnant, your body would have produced enough hCG (human chorionic gonadotropin) for a test to detect. Key points about your situation:

  1. Withdrawal method risk – While not 100 percent effective, the risk is lower if ejaculation does not occur inside.

  2. Emergency contraception (birth control after sex) – If you took emergency contraception (like the morning-after pill), it should have reduced your risk significantly.

  3. Timing and ovulation – If ovulation had already passed when you had sex, pregnancy chances are very low since fertilization typically happens only during ovulation.

  4. Pregnancy test accuracy – Most home tests are reliable after 14 days post-intercourse, so testing tomorrow will be highly accurate.

What you should do:

  1. Retest tomorrow morning – Use first-morning urine for the most accurate result.

  2. If negative and there is no period in a week – Retest or see a doctor for confirmation.

  3. Manage stress – Anxiety can delay periods, so try to relax.

Based on what you described, your pregnancy risk is low, and tomorrow’s test should be reliable. Let me know if you need more clarification.

I hope this information will help you.

Thanks.

Medically reviewed byiCliniq medical review team
Published At May 26, 2025
Reviewed AtJune 4, 2025

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