Why cant you use a pregnancy test twice?
2006-10-03 13:32:04 · 16 answers · asked by sugarpie 3 in Pregnancy & Parenting ➔ Trying to Conceive
Because once the urine has touched the applicator, the chemical reaction has already occured.
2006-10-03 17:28:00 · answer #1 · answered by Rose C 2 · 0⤊ 0⤋
They are single use and don't work after the first time. Once it absorbs urine the first time peeing on it a second time won't do anything. It's expensive to keep testing all the time but if you chart your cycle (websites like www.fertilityfriend.com can help with that) it might help with knowing when to test and when you're more likely to conceive. Good luck.
2006-10-03 20:36:09 · answer #2 · answered by Miriam Z 5 · 0⤊ 0⤋
Because once its been in the urine, traces of the old urine will interfere with the new results the second time around.
Its hard to give an answer to a question thats pretty obvious.
2006-10-03 20:34:03 · answer #3 · answered by Crazy_person 3 · 0⤊ 0⤋
I'm guessing beacuse the ink that uses to let you know if you are pregnant or on is being used. Is like trying to use a pen with no ink..common sense
2006-10-03 20:34:01 · answer #4 · answered by lisirm 2 · 0⤊ 0⤋
well, it's not the silly question, the real silly question would be "why can't you use a condom twice"... Or it's coming next?
2006-10-03 20:34:59 · answer #5 · answered by miss 3 · 0⤊ 0⤋
Once you have soaked it it one urine sample and you did it again it cannot get the accurate reading.
2006-10-03 20:35:18 · answer #6 · answered by Nikoale 2 · 0⤊ 0⤋
because once you pee on it, that's it the litmus paper is used up and it doesn't go back to the way it was ... it's a one shot deal ...
2006-10-03 22:16:36 · answer #7 · answered by emnari 5 · 0⤊ 0⤋
Because once you use it, it doesn't work again!
2006-10-03 20:33:32 · answer #8 · answered by kathy T 2 · 0⤊ 0⤋
because it wont be accurate.its a one time use type of thing.
2006-10-03 20:36:21 · answer #9 · answered by luna1081 2 · 0⤊ 0⤋
I don't think so-Maybe for a different person but thats gross go buy a new one!!!!!!!!!!!
2006-10-03 20:33:23 · answer #10 · answered by Shiv 4 · 0⤊ 0⤋