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Under laboratory conditions, home pregnancy tests are 99% accurate. There could be several reasons for a negative reading for one test while there is a positive reading for another test a few days later: 1) Sensitive home pregnancy tests can detect pregnancy 7-14 days after ovulation. It may be possible that the first test you took was too early to detect the hormone hCG (the hormone produced from a pregnancy). 2) The first test may have been taken incorrectly, such as not had enough urine to read correctly. For example, drinking high volumes of water can diminish test accuracy. First morning urine is considered the ideal time to take the test because it contains the most concentrated presence of the hormone hCG, or waiting several hours after last urinating. 3) This is least likely of the possibilities, but a false positive result. These are very rare. Sometimes the tissues in a non-pregnancy woman can produce hCG, but they are usually so low that a home pregnancy test can not detect them. The best way to know for sure if you are pregnant is to have your doctor run the test. It is more accurate than a home pregnancy test and he or she will be able to instruct you on what to do if it comes back positive. Good luck!

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Q: If you take a pregnancy test and it came out negative but took one again three days later and came out positive. could this mean im pregnant.?
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If a man ejaculates and you have no symptoms of pregnancy and still have regular periods could you still get pregnant?

no Not unless he does it again and his timing is better.


Howlong should you wait to take a pregnancy test if you have irregular periods?

With irregular periods you should test according to your longest cycle in recent months. If you are uncertain when your period is due or could be due, it is recommended to test at least 19 days from the day you think you became pregnant. If the result is negative you should test again in 3 days because you may have tested too early. Good luck.


Can you get pregnant right after a miscary?

The conditions for getting pregnant after a miscarriage are similar to those for pregnant under "normal" circumstances. After all, a miscarriage is nothing else than an "way too early birth" of child (however small or developed). So to get pregnant: * you have to be virile overall, no reproductive problems * you have to be in the right period of your cycle * your womb is recovered from your miscarriage and "ready to receive" again. Rule of thumb to know it is: you have had a couple of periods again after your miscarriage. * and naturally you have had intercourse with a virile male partner... How quickly you can get pregnant again after your miscarriage under normal circumstances thus depends on the availability of a egg, sperm, and a womb that is ready to receive.


Does a line going across on a pregnancy test always mean that you are not preagnet?

No. Home pregnancy tests are not 100 percent accurate and reliable. Also you may have taken the test to early and should try again in a few days.


Why is water both adhesive and cohesive?

Cohesion in water is the water being 'sticky' or attracted to itself. Adhesion in water is when the water is 'sticky' or attacted to other surfaces. Water is cohesive and adhesive because of it's properties. The oxyogen and hydrogen molecules are bonded together and are polar. Beacuse the molecules are polar the particales are therefore attracted to each other from negative to positive end (cohesion), but are also atracted to other particles in other surfaces, again positive to negative poles (adhesion). It's very important that water be both cohesive and adhesive for being good for solutions and other functions.

Related questions

What does it mean when you have a - and a on a pregnancy test?

A positive answer on a home pregnancy test means that you are pregnant and should see a Dr. A negative answer means that you are not pregnant. If you get a negative response and feel that it is in error you should wait two days and test again or see your Dr.


Negative pregnancy test but urinated on it again and it went positive?

This happened to me when I got pregnant with my third child. The first test was negative and the second positive. From what I understand, a pregnancy test can give a false negative but rarely gives a false positive.


When I took first pregnancy test its become negative but I took second pregnancy test its become positive now what can I do?

Try one more time. If it is again positive, then you probably are pregnant.


Will a pregnancy test show positive when breastfeeding?

Not unless pregnant again.


How accurate are ClearBlue pregnancy tests?

The ClearBlue pregnancy tests are 95% of the time accurate. If it comes back positive, then you are definitely pregnant, however if it comes back negative you may still be pregnant, so you may have to take it again in a few days.


Can you pass a home pregnancy test and not be pregnant?

It is possible to get a false positive on a pregnancy test, but highly improbable. I once went in the doctor after taking a home pregnancy test and the doctor basically said that he would not test again, because they use the same test and I was pregnant. But, I did get a false positive as a teenager and the 2nd test was negative. Take a 2nd test.


Can a negative pregnancy test be used again then turn positive after being reused?

A pregnancy test can NOT be reused and it will not show a accurate answer.


When can you take a pregnancy test and it show up that you are pregnant?

You can get a positive home pregnancy test as soon as 7-10 days after implantation, but don't get frustrated if it takes longer. I have a friend who didn't get a positive result until 8 weeks and 2 missed periods and she had a perfectly healthy pregnancy and baby. I didn't get a positive until 6 weeks the last time I was pregnant and I am positive I am pregnant again, 4 days late and still testing negative. The best thing to do is take care of your body as if you are pregnant until you know for sure. Good luck!


If you are 18 days late and your home pregnancy tests are positive and you go for a blood test and it is negative could you be pregnant?

If the tests are positive and you are 18 days late I would assume that there is a greater chance of being pregnant than not. Consult your physician again and ask them for advice or another test.


Your wife had a baby about three months ago now she took a pregnancy test and it showed up positive faintly and then two the next morning which show negative Is that hormones from the first pregnancy?

Nope it sounds like your wife is pregnant again. Although rare to get pregnant again in the first three months after giving birth its been known to happen.


What are the benefits of o negative blood?

If you are a blood donor your blood can be given to anyone. Everyone who is O negative is OO negative, by father, husband and both my sons are all O negative. If you are a rhesus negative woman married to a rhesus positive man you may need to have Anti-D while pregnant and after delivery to prevent your blood becoming sensitised and affecting a Rhesus positive baby More elaborate answer on pregnancy in rhesus negative women: If you are a rhesus negative woman pregnant by a rhesus positive partner you WILL (typically only after the first pregnancy, but, it's suggested with any pregnancy of a Rh- woman) need a RhoGAM (Anti-D) injection in early pregnancy to protect the embryo from being miscarried from an attack by your immune system and again during or immediately after delivery to stop the fetal blood (which most likely will be positive) from mixing with your blood preventing your death. Negative can successfully mix with positive, but, positive will kill a negative.


I didnt had my periods for 29 days and the pregnancy test also became negative are you pregnant or not?

take the test again they can be wrong