Q. Is there a possibility to get false negative pregnancy result six weeks after sex?

Answered by
Dr. Dattaprasad Balasaheb Inamdar
and medically reviewed by Dr. Sneha Kannan
This is a premium question & answer published on Jan 08, 2016 and last reviewed on: Sep 09, 2019

Hello doctor,

I am a 20 year old female and had sex for the first time. I took Regestrone to delay my periods because I planned to get intimate the same day as my periods. I took them for three to four days before my expected period date and had the tablet two to three times a day. Last dose I had it just the night before having sex. I had sex many times the next night but with protection and took an i-pill to be sure. Next week got light periods that were very painful. But ignored it thinking it was because of hormonal imbalance. Both of us were affected by flu and it turned into a stomach infection with alternate periods of diarrhea and constipation that was accompanied with mild nausea but had no vomiting. I became very weak and then eventually recovered by taking Pantocid, Digene and Zandu pancharishta. I am six days overdue and had slight back pain, nausea and increased urination. I do have migraine issues as well as I am quite obese with a BMI of 33.8. I got two home pregnancy tests done and both of them turned out to be negative. However, I still have not got my periods yet and I have been insisted to check for PCOS and get an ultrasound done. I am worried if the ultrasound shows that I am pregnant. I have gained about 4 kg. Is it possible to get a false negative six weeks after having sex? What can I do to get my periods early? Please advice.

Dr. Dattaprasad Balasaheb Inamdar

Infertility Obstetrics And Gynaecology


Welcome to icliniq.com.

It is impossible for a urine pregnancy test to show false negative six weeks after sex. Delay in periods may be as a result of anovulation due to stress or infection as well as because of gaining weight.

For regular ovulation and to avoid hormonal imbalance, it is advisable to maintain your weight. Healthy BMI (body mass index) is essential for our overall health as well as reproductive health.

No pregnancy will be seen in ultrasound when a urine pregnancy test is negative. If you had regular periods previously, you can wait for a week for the start of menses. Or can induce withdrawal bleeding by having tablet Progesterone (Medroxyprogesterone acetate) twice daily for five days.

Period generally starts within a week of stopping tablets. If you get periods while taking tablets, you can just stop them. It will not cause any harm.

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