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9 answers

It depends on the sensitivity of the test, but usually not. They test for a certain level of hormone and if you have less than that, the test won't pick it up. The earlier you test, the more likely you won't have enough HcG for the test to register.

2007-01-16 11:02:49 · answer #1 · answered by imdevaskyla 2 · 0 0

I took 2 pregnancy tests 7 days before my period was due and both were positive. I used the Answer brand and Clearblue easy brand also but the answer test was very bold in the line that was positive where the other test was faint.
How soon can I test? Well, first you gotta know how the test works. Briefly: the home pregnancy test (HPT) works by detecting a hormone called human chorionic gonadotropin (hCG.) When an egg is fertilized, it takes about 6 to 12 days to implant in the uterus, and then it begins to secrete hCG. It takes another day or two for enough hCG to build up and make its way into your pee. So, generally speaking, the earliest you can expect a positive HPT is 8 days past ovulation ("DPO") and the latest would be about 16 DPO. It is possible to get a positive test earlier or later, but not as common. In my experience, if you use a sensitive "early" test (anything that detects 25 mIU/mL of hCG or less) you can test around 12-14 DPO and feel reasonably secure with your results (the later you test, the more secure you can feel in its accuracy.)

If you do not chart or monitor your fertility in any way, and you think you may have conceived, you should wait 19 days (or longer) after having sex to test. Why 19?! Sperm can live approximately 5 days in the proper environment; if the sperm managed to live until you popped an egg, the actual conception could have taken place several days after the sex act that got the sperm there. To make sure you're not testing too early, assume the sperm had very long lives (5 days is considered a very long sperm life) and that conception occurred then. Then allow 14 days for the embryo to implant and develop enough hCG to show up on a pregnancy test (96% of pregnant women will test positive by then.)

Note: some HPT's say "test 5 days before your period is due!" or some such thing. Please note they are assuming a textbook 28-day cycle, with ovulation on Day 14. "5 days before your period is due" thus really "translates" to 10 DPO.

Essentially, you should remember that your high school biology textbook was WRONG. NOT all women have 28-day cycles and NOT all women ovulate on Day 14. For more info on this type of thing, see the Fertility Info section.

Here's an example. This is the textbook-perfect 28-day cycle with ovulation occurring on day 14 (in pink.) 10 DPO and later are reasonable days for testing (in green.) This is the cycle the HPT companies have in mind when they say "test 5 days before your period is due!"
http://www.peeonastick.com
Good luck

2007-01-16 11:10:08 · answer #2 · answered by ஐ♥Julian'sMommy♥ஐ 7 · 0 0

They can work earlier, believe me I know!...however the result may not be as good/clear and it is best to follow instructions to get the best results.
If you are desperate to know, it won't harm to take a test now, but remember if it appears negative and it is too early it may not give you the correct result. If you have to take the test now and can't wait, make sure you do a follow up 5 days before the missed period or a little later as the result could be different. The most accurate way is to get a blood test to detect the HCG hormone.
Good luck

2007-01-16 11:07:25 · answer #3 · answered by Sparkle 3 · 0 0

No you won't. Your body takes time to manufacture the pregnancy hormone that makes the test turn positive. Any time before what the box says will not be accurate. It's just too soon to tell.

2007-01-16 11:05:28 · answer #4 · answered by redrum42482 2 · 0 0

I would wait until after I miss my period. Yes pregnancy test box does say that, but I would wait

2007-01-16 11:03:35 · answer #5 · answered by Halo Mom 7 · 0 0

it really depends.. I got my positive answer 7 days before my missed period.. so it is possible to get a positive answer as early as a week before missed period, but it's not guaranteed.

2007-01-16 11:33:06 · answer #6 · answered by Ellanora 3 · 0 0

probably not. i have the excact same box probably. wait until your period is due or even a week later. by then you should be able to get an accurate result

2007-01-16 11:03:19 · answer #7 · answered by Anonymous · 0 0

i hear for the best is just wait till that missed period i know i have tested to early and gotten neg its so hard to wait but good luck to you!!!!!!!

2007-01-16 11:03:16 · answer #8 · answered by BlessedMommyof3.. 5 · 0 0

no it wont read. its best to wait till your late those tests say they read that early but they rarely do

2007-01-16 11:05:00 · answer #9 · answered by kleighs mommy 7 · 0 0

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