I missed my period yesterday but still have a BFN. I'm really frustrated... I feel like I'm pregnant but still don't have any proof.
I thought I'd share some info I digged up from BabyMD (I don't know anything about the site but they had lots of useful and sane articles). One article I read emphasized that only 40% get a BFP on a HPT before their missed period and that 50% get a BFP on the day of a missed period.
In another article they explained the reasons for the delay in BFPs for some people... I'm copying it below in case it helps others in this thread:
"Urine (Home HPT) Pregnancy Test: The urine pregnancy test will usually not become positive in most women until a missed period or about a week after implantation. Many manufacturers of urine pregnancy tests want you to believe that the urine test is usually positive before a missed period, but only about 25% of pregnant women will test positive with the HPT 2 days before a missed period, and about 40% the day before the missed period.
The wide variation of when the urine pregnancy test becomes positive and how early can pregnancy be detected are due to four variables which determine when the home urine pregnancy test becomes positive:
- Timing of Implantation
- Blood hCG levels
- Urine hCG level (eg.how concentrated or diluted the urine is)
- Sensitivity of the pregnancy test
2. Blood hCG Level
There is a wide normal variation of hCG levels, both in the blood and the urine and this wide range changes the diagnosis of how early can pregnancy be detected. If a woman has low blood hCG levels, for example, then it can take several more days for it to show up on a pregnancy test.
3. Urine hCG Level
Urine hCG levels change over the course of the day depending on how much you drink and how diluted or concentrated the urine is. Urine pregnancy testing is best done with more concentrated urine. So how early can pregnancy be detected depends on the urine concentration. If you drink a lot of fluid, the urine may be too diluted early on in pregnancy to achieve an hCG concentration adequate enough for a positive test."
So should I try not to drink all day? :)
Good luck everyone!