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    Could I be pregnant?
    avatar
    meg2180 posted:
    I got my period on Jan 8. I have been having sex with my husband at least once a week since then. I started getting brown spotting on Feb. 7. It has been very light and even non- existent some days. I did take a pregnancy test on Feb 10th. It was negative. Is this just a short, light period? Or should I take another test?
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    avatar
    Jane Harrison Hohner, RN, RNP responded:
    Dear meg: If the first day of your last period was January 8th, then probable date for ovulation/conception would have been January 22nd (if you have regular 28 day cycles). One would hope to get an accurate home pregnancy test (HPT) by February 7th.

    However, it takes an implantation to produce hCG to trigger a test. In a study where day of implantation was documented with a sensitive blood test, it was determined that 10% of viable pregnancies were not yet implanted by the first day of the missed period.

    Having read all this you can now understand why a GYN may recommend using a HPT twice, if the first instance is at the time of missed flow. About 97% of viable pregnancies will have implanted by seven days after the first day of missed menses. Taking a second reading can also enhance accuracy where your HPT is not one of the super-sensitive brands.

    If you have a second negative HPT by Valentine's Day then the most likely explanation would be a too-light flow caused by a missed ovulation. I don't know how this works but sometimes the body will perceive the "happy stress" of trying to conceive as enough of a stress to temporarily throw off regular ovulations.

    Hope you did conceive this month. If not, hope you conceive very soon.

    Yours,
    Jane


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