L.F. asks from Chicago, IL on March 07, 2009
Pregancy Test, False Positive
My spouse and I had intercourse 2weeks & 2days ago (to be precise). I have been feeling like I'm pregnant (tired and burping a storm!). I was pregant in December, unfortunetly misscarried shortly after...but had the same symptoms then as I do now. I took a pregancy test two days ago, had a "faint" positive sign. I was excited guessing that my Hcg levels are just probably really low at this time and decided to retest a few days later. So it has been two days since my +test, took a digital test today, results negative. I'm so upset. I followed the directions. I guess I'm going to give it another week then retest. Has anyone ever had a similar circumstance? Also my doctor has me taking the drug Prometrium since last intercourse as a preventative measure against misscarriage. Has anyone taken this medication...did they have any problems with pregancy tests not reading acurately or did the medicine make them tired/burpy? I know I'm asking a ton, would really appreciate any feedback. I'm wondering if it would be a waste of time to go to my doctor have blood work done. Would it show up in my blood if not in my urine?
A.M. answers from Chicago on March 08, 2009
It may be that you had what is known as chemcical pregnancy - an egg fertilizes and implants but then doesn't get any further. they are very common. most of us don't notice when we have one because we aren't paying such close attention. The positive is that they are nature's way of ensuring that an egg that wasn't right usually chromosomally abnormal doesn't develop. They aren't anything to be worried about as they are really common. Now that so much research has been done on IVF etc. docs now know that over half of embryos created are not chromosomally normal - perhaps as much as 75% of embryos even in young people and nature deals with this by either not fertilizing, not implanting, or not growing. Good Luck next time.
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M.R. answers from Chicago on March 07, 2009
During your menstrual cycle, in the first half (ovulatory phase) estrogen is the dominant hormone. Estrogen helps to grow the egg and prepare it for ovulation. In the second half (luteal phase) which is after ovulation, progesterone surges in the event a pregnancy would occur and need to be sustained. If you actually get pregnant, progesterone levels stay high but if you're not pregnant, progesterone levels drop causing the lining of the uterus to shed and commencing menstruation. Taking a supplement like prometrium is a form of progesterone and your doctor would have you take it to assist in the maintenance of the pregnancy.
Given your previous issues and current test, if this were me I'd make an appointment with the doctor and get blood tests just to be sure.
S.E. answers from Chicago on March 08, 2009
I would wait and retest. Different HPTs measure different amounts of HCG so it could be your second test (if it was a different brand) didn't pick up your levels like the first. (you can google and find out which tests are most sensitive) I don't believe there are false positives, only false negatives, so I believe your first test was correct. I know it's not the answer you want, but I had this happen and it was a chemical pregnancy. Very common, but sad when you're hoping to get pregnant and monitoring your cycles. Most of the time, we don't even know about chemical pregnancies. If this is the case, the good news is, you're conceiving. I had 1 miscarriage at 8 weeks and 1 chemical pregnancy before conceiving my healthy daughter. The Prometrium is to boost your progesterone levels and aid implantation and should not have any effect on the HPT. If this is not the pregnancy you'd hoped for, I hope the next one is. Hang in there and best of luck to you.
L.C. answers from Chicago on March 08, 2009
If you had a line, you were pg at the time i.e. you had enough hcg in your system to produce a positive test. Likely, you had a chem pg. This would show up on a blood test - you'd probably have a very low hcg level. I had some pg symptoms very early once, but then got my period. Had the doc check my hcg - it was low, but it was there - a chemical pg.
L.B. answers from Chicago on March 07, 2009
Were both tests the same brand from the same lot? It's possible one of them was just a bum test, possibly due to being old or if they're different brands, tests do vary by the levels of hcg they can identify. Or it's possible the positive was actually and evaporation line (if you read it past the time the instructions said to check it). Also if you tested at different times of the day, it might jsut be the difference in the concentration of your urine at that time. False positives are extremely rare I have heard, so I think it would be more likely that the second test was defective, or possibly that it was a chemical pregnancy and your hcg levels already dropped below the levels the test can detect.
I'd personally give things a few more days and test again.
J.K. answers from Chicago on March 07, 2009
My doctor said the same thing about no false positives. (I had a really faint line too). Maybe the digital one wasn't accurate. Or maybe your medication could have something to do with it.
M.M. answers from Chicago on March 08, 2009
Yes, hcg can show up in your blood and not your urine. I had a negative test with my first and a very faint line with my second pregnancy.
L.W. answers from Chicago on March 08, 2009
I think you should definitely call the doc tomorrow. If this is a miscarriage, he needs to know. If you are pg but have low levels it could be that you need something to aid your pregnancy, like a progesterone supplement. Most likely your doctor will give you a blood test. That's what I would reccommend as well.
Also, with the second test, did you make sure that you tested with your first urine? Always pee in a cup (like a dixie cup) and use a first response early results test. The blue dye tests can be misleading. Digitals are also not always accurate as some are less sensitive.
The first "positive" could also have been an evaporation line. Did the line come up with on 10 mins? Was it colored (pink, blue) or grayish? A grayish line would equal an evap line.
Good luck to you! I hope this turns out to be a happy healthy pregnancy!