my periods 19 days late. the first test i took about 5 days after my missed period and it said negative...and so did the one i took the next morning. About 7-8 days after that i took another one which i thought was negative but i was in a rush that morning and when i came home it was positive. how can some tests be positive and others negative? and what other explanations are there for being so late, the only thing im stressed about is getting my period.
2007-01-13 10:23:47 · 8 answers · asked by Ryan H 1 in Pregnancy & Parenting ➔ Other - Pregnancy & Parenting
That positive line could have been a evap line because if a line shows up after 10 minutes it does not count.
Here is some info from http://www.peeonastick.com
What's an evaporation line? Evaporation ("evap") lines result with the test's antibody strip just looks slightly different than the space around it. There is a line of antibodies (usually made from mouse cells) in the Control and Test section. The Control line binds with any liquid and turns pink (or blue, in tests using blue dye.) The Test/Result line turns pink only if pregnancy hormone is detected. If not, the moisture passes over this strip and does not turn pink. It may, however, become more visible when the light hits the moisture on the strip-- it may appear gray, colorless, like a "dent" in the test, or like a "ghost line." It may appear at any time-- as soon as the urine hits it, after a few minutes as the test absorbs the moisture, or after the 10-minute time limit. It may appear when the test is drying, or after it has dried. It may disappear as the test is drying, or after the test has dried, or not disappear at all.
The simple fact is that there is always "something there" that is slightly visible-- it's simply the antibodies on the test that would turn pink in the presence of hCG. When the test becomes wet, or as it dries, or after it dries, the antibody strip may become more visible. Therefore, all tests may have them. It is not a defect; it's just how tests are made.
A real positive is identified by its color (pink or blue, whatever the color of the test's dye is) and its appearance within 10 minutes of urinating on the stick. A line that appears after 10 minutes, regardless of color, must be considered an evap line and is caused by the test's chemicals changing. HPT's are rapid assay diagnostics, which means any results appearing after the "rapid" time limit of 10 minutes are invalid.
took several tests and got both negatives and positives. What gives? See FAQ 9 above; there are many variables-- concentration of urine, sensitivity of the test. Since true false positives are pretty rare, if you get at least one positive HPT, you are probably pregnant. Wait a couple of days and test again or try another brand if you are suspect. If you suspect you have a true false positive (meaning you did not conceive and still got a positive
2007-01-13 10:28:11 · answer #1 · answered by ஐ♥Julian'sMommy♥ஐ 7 · 1⤊ 0⤋
Take a new test with your first morning urine. The test that was positive is not what you should go by. Your are exspose to read those with in minutes and not hours. If you let them sit for a while then they are inclusive. So more than likely that test to was negative. Thewre are alot of reason a womens period could be late. Stress, weight, thyriod, pcos.....take another test in the morning.
2007-01-13 10:29:57 · answer #2 · answered by CHRISTY R 2 · 0⤊ 0⤋
the test would have dried out by the time u got home and that can show up the positive line thats y they tel u 2 read the test within a certain amount of time
2007-01-17 05:09:05 · answer #3 · answered by Mel 5 · 0⤊ 0⤋
If you have been having periods for more than three years, you may be pregnant. If you had two years or less, your body is still getting into the cycle of having a period. My period is two months late, but I don't worry because I haven't been having any SEX. Have You?
2007-01-13 10:28:30 · answer #4 · answered by Kristina 2 · 0⤊ 0⤋
if you read the test after some hours it is not accurate anymore. repeat it when you are not "in a rush": it sounds like something else other than this thought is stressing you
2007-01-17 06:24:24 · answer #5 · answered by geena 2 · 0⤊ 0⤋
my guess is ur pregnant some tests r negative because the hormone thats released when pregnant is to low to be detected because the pregnancy isnt that far along
2007-01-13 10:29:32 · answer #6 · answered by vic b 2 · 0⤊ 0⤋
you eally could be pregnant. Are your periods normally this late? You may want to go see your doctor.
2007-01-13 10:29:35 · answer #7 · answered by desirooo58 3 · 0⤊ 0⤋
go to the doctor and get a proper test. there more accurate.
2007-01-13 10:27:55 · answer #8 · answered by greenfish 2 · 0⤊ 1⤋