Pregnancy Tests

Ask questions here about how to take pregnancy tests properly, when to take them, how to determine unclear results and more.

11,213 Questions
Pregnancy Tests
Drug Tests

What test can be performed to detect a leak after fueling a gasoline-powered boat?

Sniff test

Pregnancy Tests

How can you tell if you are pregnant and how soon after sex can you find out?

  • The most accurate and reliable way is to take a pregnancy test. You can either buy one from the supermarket or drug store or get the doctor to do one. You can take one 3 weeks after sex.

  • Doctors say home pregnancy tests are not at all reliable until 7-14 after conception.

  • An HPT (home pregnancy test) is recommended 4 days before your period is due, some on the market now are more sensitive up at 15-20 IUL. To make sure you get an accurate result, it's best to wait until you are closer to your period or till you are at least a day late. A blood test can be taken and be accurate as soon as 6 days after fertilization.

  • Tests are different and women are different.

  • Early pregnancy tests can now be taken 5-4 days before period should start. If you don't know when you start your next period but you know when you had unprotected intercourse take the test 19 days after sex. If you don't know when you had unprotected sex but you know when your next period should due take the test a week after your period was supposed to start (but it didn't). If you don't know either of them wait 45 days after the first day of your LAST menstrual period.

  • However, the tests are MOST accurate around when your period is already 10-15 days late. Before this time you MAY get a FALSE negative result.

  • I had a BIG FAT POSITIVE on the morning my period was supposed to come. My friend didn't test positive until a week after.

  • Every women is different and we all conceive and have implantation at different times.

  • The first time you miss a period, you should go and take a pregnancy test.

  • I have taken a pregnancy test 4 days before my period was due. I tried 2 different tests. One type one day and the other type the next day and they both came out positive. It just depends on the test and how sensitive it is but I will be taking another one the day my period is due just to make sure.

  • It's best to take a test 3 weeks after you had unprotected sex, but that's probably with a cheap pregnancy test because they are less sensitive and need higher levels of the pregnancy hormone to give a positive result. To get an accurate result you should work out when your next period is due and then you can take it the day after a missed period. If your period comes that day, you're not pregnant unless it's implantation bleeding, which is much lighter than a normal period.

  • As above, it can depend on the test, some of the cheaper ones are not good and a waste of money. I would recommend 'Clearblue' or 'First Response'.

  • I think it's best to wait until you've missed your period before you even bother buying a test or just go to your doctors surgery and ask them to do a test.
Pregnancy Symptoms
Pregnancy Tests

How long does it take to find out you're pregnant?

It takes about a month. If you read the pregnancy test it says that the month after you think you conceived is when you can test yourself, and the result will probably be more definite.

A pregnancy test will give an accurate result 3 weeks after sex.

14 weeks after intercourse is the most accurate date for determining pregnancy with a home pregnancy test.

Pregnancy Symptoms
Pregnancy Tests

How long does it take to find out if you are pregnant?

A pregnancy test will give an accurate result 3 weeks after sex.

Pregnancy Tests

Does Depo-Provera affect the accuracy of a pregnancy test?

No. The hormones detected by a pregnancy test is for a growth hormone the embryo produces to help maintain the pregnancy. The Depo Provera shot is a different type of hormone that has nothing to do with any hormones detected by a pregnancy test.

A positive pregnancy test means you're pregnant, even if you are on or recently stopped Depo Provera.

A negative pregnancy test means you're not pregnant, or that you took the test too early. Repeat the test in a week or two. If that one is also negative, you're not pregnant.

Since women often have no period when they're on Depo Provera and after they stop the shot, many come to believe they must be pregnant. Symptoms ranging from breast tenderness and cramping (which can mean ovulation after stopping depo provera) to headaches, gas, and yeast infection become "proof" to women that they must be pregnant. Take one pregnancy test is you really think you might be pregnant. Take another two weeks later. Follow the instructions that come with the test. If you're pregnant, that second test will come up positive. Don't waste your money taking a dozen pregnancy tests.

Pregnancy Symptoms
Pregnancy Tests

If your test is negative and you have your period can you still be pregnant?

Period delay isn't a definite sign of pregnancy. Lots of things can cause a period to be late. I am normally a very regular person and I have been late the last two months.

If you are still unsure, take a home pregnancy test and find out for sure.

In the first couple of weeks-you can experience a multitude of symptoms such as light-headedness, nausea, sore breasts, more than normal vaginal discharge, sensitivity to smell, period-like cramping, light spotting also known as "implantation bleeding", heartburn, gas, constipation, metallic taste in mouth, darkening of nipples and the list goes on. Some women experience symptoms as early as the first two weeks-others don't get any symptoms-and most feel symptoms starting at about the time of their missed period. There are a huge number of signs and symptoms that can tip you off that you might be pregnant! Of course the only way to know for sure is a positive pregnancy test (around 12-14 days past ovulation). But for all of us who are trying to conceive it is hard not to speculate about every sign!

Hormone levels increase dramatically even in very early pregnancy, which is the main source of all pregnancy symptoms. Some women will experience symptoms as early as implantation (6-12 days past ovulation) and others will only start to experience symptoms around their expected period, and others don't notice any difference until they are about 6 weeks pregnant.

You could have a cyst on your ovaries.

The pregnancy tests aren't always accurate, so I would talk to my doctor if I were you.

Pregnancy Tests

How soon can I find out if I'm pregnant or not?

You can take the test 10-14 days after sex.

14 days after intercourse or the day of your expected period.

Your symptoms of pregnancy will usually appear anywhere from the first week of your expected period to 1-2 weeks after your first week of expected period. Your first signs of pregnancy most commonly include missed period, tender/swollen breasts, change in color of the breasts, fatigue, nausea/vomiting, increased sense of smell, and weight gain.

Here is a link to a website that will calculate the probability of your pregnancy:

To ensure the best results for a home pregnancy test:

  • Take the test in the morning, if possible, because your hCG (pregnancy hormone) levels are at it's highest
  • Don't drink a bunch of fluids before taking the test because it will dilute your urine and can affect the results
  • Take the test no more than 1 day before expected period. Although some test say that you can see results up to 5 days before your missed period, the percentage of accuracy is very low. OR 14 days after intercourse (sex).
  • urinate for as long as possible on the foam-like strip
  • Check the results in the window frame of time suggested by the instructions of the pregnancy test.

    Either two weeks after intercourse or:

    According to the ClearBlue pregnancy test accuracy results they are:

    4 days before expected period= 51% accurate

    3 days before expected period= 82% accurate

    2 days before expected period= 90% accurate

    1 day before expected period =95% accurate

    the day of expected period =99% accurate

Usually two weeks after intercourse.

2 weeks after you had sex at the earliest

AnswerMost women don't find out they are pregnant until they are at least a month pregnant because that is when they miss their period. Most home tests can't be taken until after a missed period also.
Pregnancy Tests
Birth Control Pill
Birth Control Patch

Does birth control affect the accuracy of a pregnancy test?

Hormonal birth control (such as the pill) does not affect the accuracy of blood or urine pregnancy tests. Pregnancy tests measure a hormone (hCG) only present in pregnancy.

To ensure the best results: * Take the test in the morning, if possible, because your hCG (pregnancy hormone) levels are at it's highest * Don't drink a bunch of fluids before taking the test because it will dilute your urine and can affect the results * Take the test no more than 1 day before expected period. Although some test say that you can see results up to 5 days before your missed period, the percentage of accuracy is very low. * urinate for as long as possible on the foam-like strip * Check the results in the window frame of time suggested by the instructions of the pregnancy test

While it depends upon the sensitivity of the specific test, most home urine pregnancy tests (sensitive to 25 mIU) will turn positive about 13-16 days after conception. If you were not on oral contraceptives, this would mean about the time of the first missed menses. When you are on oral contraceptives, ovulation could have occurred at more irregular times so that all you can say is if the pregnancy test is negative, you are either not pregnant or are less than about 14 days pregnant from ovulation.

Pregnancy Tests

How do you know if you are pregnant if you are on Depo-Provera?

If you are referring to the depo shot, many women have very light to no periods while on it. Chances of getting pregnant are very slim but the only way to know if you are is if you take a pregnancy test especially if you start having other than the missed period pregnancy symptoms such as nausea, frequent urination, tender breasts, increase in appetite, etc.

Pregnancy Tests
Intrauterine Devices (IUDs)

Does the IUD affect the accuracy of a pregnancy test?

Your IUD does not affect pregnancy testing. A pregnancy test measures the presence of a hormone called hCG in your urine. Some IUDs [eg the Mirena coil] release hormones, but these will not affect your hCG levels and so have no effect on pregnancy tests.

If you have an IUD and get a positive pregnancy test result it is very important that you see your doctor immediately. This is because if you get pregnant with an IUD in-situ you have an increased risk of ectopic pregnancy (where the embryo implants in the Fallopian tubes instead of the uterus). Complications of ectopic pregnancy can be fatal, so your doctor will want to do an urgent ultrasound scan to ensure that you do have one. This is very rare - the risk of pregnancy with an IUD is very low (less than 1 in 1000), and the risk of ectopic pregnancy is lower still, but it is still important to have this checked by a doctor.

Pregnancy Symptoms
Pregnancy Tests
Pregnancy - hCG Levels

Does a missed period mean no ovulation occurred?

if you have missed one period it doesnt mean no ovulation or pregnant you could be lat starting but if you still havent started after a few days of when your period should of started go to your doctor your pharmicest and take a pregnancy test because you could be pregnant.

Pregnancy Tests

Can anemia effect a pregnancy test?

Pregnancy tests measure the level of beta-HCG, a hormone present during pregnancy. This can be tested for in blood or, more commonly, in urine. A low hemoglobin in your blood will not affect this reading in either case.

Pregnancy Tests
False Pregnancy Test

Is a blood test for pregnancy more accurate than a urine test?

  • No Not always a blood test is more accurate, but not necessarily more sensitive. A lot depends on the lab. A quantitative blood test, usually called a beta hCG test, measures the exact units of hCG in the blood. That means it will detect even the most minimal level. There is another type of blood test sometimes called a qualitative hCG. This is a test that simply gives a yes or no answer to whether you are pregnant. Just like urine tests, labs vary as to what is considered a positive pregnancy test. Common cutoffs for positive are 5, 10, and 25 units. A level under 5 is considered negative. A test that is only triggered at 25 units of hCG is not any more sensitive than several of the urine HPTs.
  • Yes, urine tests test for hCG levels in women and A LOT of women have low hCG levels so the tests come out negative even though they are positive.
Pregnancy Tests

What are the rates for double marker test?

There are no specific quantitative values for the separate parts of the First Trimester screen. (Double Marker Test). This is a screening too, used to assess risk factors.

The test is most accurate between the 16th week and the 18th week and the correct fetal age is mandatory for accurate testing.

The blood screen measures two pregnancy related hormones: hCG and PAPP-A.

The ultrasound evaluation measures nuchal translucency (fluid beneath the skin behind baby's neck).

You will be told whether your results are "normal or abnormal", and you will be given a risk level by your genetic counselor/OB. The counselor will give you your risk factor for chromosomal abnormalities based on the test results (for example 1/250, 1/1300).

A positive test means that you have a 1/100 to 1/300 chance of experiencing one of the abnormalities. Using a maternal blood screening test with an ultrasound evaluation of the fetus to identify risk for specific chromosomal abnormalities, including Down's Syndrome Trisomy-21 and Trisomy-18.

When the test results come back in the typical range, this result reduces the woman's risk of having a child with Down syndrome.

If the woman is 25, this decreases her risk from 1/1100 to 1/4400.

If the woman is 35 years old, this decreases her risk from 1/250 to 1/1000.

If the woman is 45, it decreases her risk from 1/20 to 1/80.

85 out of 100 babies affected by the abnormalities the screen tests for will be identified.

5% of the tests will be false positive.

Pregnancy Tests
Dieting and Weight Loss

Are you supposed to stop taking hcg before your period?

Only if it becomes uncomfortable. Then start back up as soon as possible.

Pregnancy Tests

Can topamax affect a pregnancy test?

No it can not. Topamax, it to ward of headaches. OB will approve.

Pregnancy Tests

Why did my pregnancy test turn positive after one day when initially it was negative?

the first time you took the test could have been too early. one day may not seem like much but remember that it only takes nine months to make the baby so one day is a lot. or it might have been either a false positive or negative so you might want to go to the doctor

Pregnancy Tests
Pregnancy - hCG Levels

How long after a miscarriage will a pregnancy test still show positive?

It depends. I know this is likely not what someone who is hoping to be pregnant after a miscarriage wants to hear but there isn't a definitive answer since it depends when the miscarriage happened (how far along was the woman?) and also how long it takes for the hCG (the pregnancy hormone detected by pregnancy tests) to leave her system.

If a woman is wondering if a positive test is indicating the hormones left by a miscarriage or is a sign of a new pregnancy, she should go to her doctor or midwife for a quantitative (not qualitative) blood test or an ultrasound. A quantitative blood test will measure how much hCG is in her system while a qualitative blood test will do the same thing a urine test does -- say whether or not there is any hormone there. An ultrasound will examen the contents of the uterus to see if there is an embryonic sac or missed particles from the miscarriage.

Pregnancy Tests
Periods and Conception

Can you use a home pregnancy test more than once?

Certainly...but not the same one! You have to buy a new one. To ensure the best results: * Take the test in the morning, if possible, because your hCG (pregnancy hormone) levels are at it's highest * Don't drink a bunch of fluids before taking the test because it will dilute your urine and can affect the results * Take the test no more than 1-2 days before expected period. Although some test say that you can see results up to 5 days before your missed period, the percentage of accuracy is very low. * urinate for as long as possible on the foam-like strip * wait for the results!

Pregnancy Tests
Pregnancy - hCG Levels

What are HCG levels?

HGC LevelsHere are answers and opinions from FAQ Farmers:
  • I don't know the exact definition, but it is a hormone a woman's body produces when she is pregnant. Home pregnancy tests have chemicals that "look" for HCG in the urine. If there is HGC in the urine, the test will show a positive.
  • HCG stands for Human Chorionic Gonadotropin, a hormone ONLY produced during pregnancy. I'm not really sure if "levels" are important, just if it's there or not. That's what pregnancy tests screen for in your urine.
  • From what I understand, after two or more blood tests, the doctor can tell wheather the levels of HCG are rising, or lowering. If they are rising, it is good, because it rises a lot over the first three months (also the cause for most morning sickness). If they levels are rapidly decreasing, it's a sign of a miscarriage (that happened to me, that's the only reason I know all this), and if it's slowly decreasing, it probably means your into your second trimester, when the levels do drop or stop excessivly reproducing, but of course, still stay in your system. From one blood test, they can see if your pregnant, that's how the home pregnany tests work as well, but they can't tell if the pregnancy is viable until one or more blood tests are taken. I don't know if all this is totally right, but it's the gist of it.
  • The Human Chorionic Gonadotropin is a hormone produced by the mother's body during pregnancy. This is also the hormone for which a home pregnancy testing kit will test. Most home pregnancy tests will detect levels of HCG at or above 50mlU, but some 'early response' style tests can detect smaller amounts. In a normal pregnancy, the HCG levels should at least double every two to three days in the first trimester. This is why two blood tests taken a couple of days apart are often used to determine the viability of an early pregnancy.


To be honest part of your answer is wrong. You can receive HGC after you are pregnant as well. If you look up on the internet about molar pregnancies... there is weird way that HGC levels are given off into your body without you being pregnant.


Rising HCG levels during pregnancy is important. If not enough HCG amount to support the current state of pregnancy the baby may be miscarried. Urine samples are done at every dr. appt. to check to make sure you have the right levels etc...

Pregnancy Tests

How is a positive Schiff's test recognized?

When an unknown sample is added to the decolorized Schiff's reagent and an aldehyde is present, a magenta of purple color develops.


Pregnancy Tests

How accurate are pregnancy tests if taken during the day?

They're the same accuracy at any point during the day because they measure hormone levels which shouldn't change too significantly throughout a day. However, for urine tests it's advised to test first thing in the morning purely because the urine is more concentrated and so hormones would be less diluted by water. However, a pregnancy test should give an accurate result at any time of day.

Pregnancy Tests

Why do you twitch after smoking weed?

A heightened sense of awareness in your surroundings can make you startled (twitchy) in reaction to things that others see as normal.

Pregnancy Symptoms
Pregnancy Tests

When will I know whether I'm pregnant?

A couple of symptoms you could possibly notice in early pregnancy are: * missed menstrual period * nausea, with or without vomiting * fatigue * breast changes and breast tenderness * frequent urination If you have missed your period, then I suggest you see your family physician. Symptoms are not really noticable until around the 5th week of conception, but your first big hint would be of course a missed period. More opinions from FAQ Farmers: * There are several possible indicators that you are pg, but these can also be pre-menstruel symptoms too. If you have been stressed then that is another reason you have missed your period. Its not always that if you missed your period your pg because your proably not. * My 1st signs were at 4 weeks pregnant dizziness & nausea When your stomach is all huge and it's not because of junk food and no exercise! check with your doctor when you feel pushing, because it's probably the baby!!

Pregnancy Tests
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When do the 2010 UNSW ICAS test results come out?

Sepetember 13 2010


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