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Doctor insights on: When Can I Take A Blood Test For Pregnancy

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Dr. Linda Callaghan
4 doctors shared insights

Pregnancy (Definition)

When your due date arrives, you will be more than ready to have your baby! Most women deliver the baby somewhere between 37 and 42 weeks. According to the American College of Obstetricians and Gynecologists, only 5% of babies arrive on the exact due date. Approximately 7% of babies are not delivered by 42 weeks, and when that happens, it is referred to ...Read more


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I had sex on the 15th of Sept, how soon can I test for a pregnancy? my last period was Sept 5th. Can I take a blood test for pregnancy sooner?

I had sex on the 15th of Sept, how soon can I test for a pregnancy? my last period was Sept 5th. Can I take a blood test for pregnancy sooner?

After missed period: Conception, as defined by the generation of a fertilized ovum, occurs within day or so of the sex. However, it takes about 2-3 weeks for the embryo to make enough HCG to produce a positive pregnancy test. Blood test may be done a day after a missed period. Home pregnancy tests should be done 4-5 days after the missed period. If the result is negative repeat the test in 4-5 days. Use first morning urine and follow instructions for the test carefully. If you do not wish to be pregnant, use contraception all the time, every time. You may consider implanted contraceptive, or IUD. Practice safe sex. Get HPV vaccine. ...Read more

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If I take a blood test for testing something other than pregnancy. Will they be able to detect that if I might be pregnant.

If I take a blood test for testing something other than pregnancy. Will they be able to detect that if I might  be pregnant.

Blood test for preg: Blood may be used to test for pregnancy but only if that particular test is ordered. A more typical test for pregnancy would use urine. ...Read more

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Aside from my question before Ive taken multi home pregnancy tests n they've all come back indecisive/read error. So should I take a blood test?

Aside from my question before Ive taken multi home pregnancy tests n they've all come back indecisive/read error. So should I take a blood test?

Yes: If hpt is not decisive and you missed a period after unprotected sex, it would be prudent to take a blood test. If you do not wish to be pregnant, use contraception all the time, every time. You may consider implanted contraceptive, or IUD. Practice safe sex. Get HPV vaccine. ...Read more

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I had a 1day period that is usually 4-7days. My home pregnancy test was negative, should I take a blood test?

I had a 1day period that is usually 4-7days. My home pregnancy test was negative, should I take a blood test?

Re do the test: If 4-5 days have passed since the last test, you may be just as well off by doing the home test. Use first morning urine and follow the instructions for the test carefully. ...Read more

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My period is almost 6 days late, negative pregnancy test? Should I take a blood test? What could be going on? Usually very regular

My period is almost 6 days late, negative pregnancy test?  Should I take a blood test? What could be going on? Usually very regular

Anovulatory cycles: during which an egg is not released, are common and can cause menstrual irregularity or a missed period. Anovulatory cycles are especially common in young women, and 1-2 anovulatory cycles/year is considered normal. Urine pregnancy tests are very reliable and there is not much to be gained by a blood pregnancy test except expense. ...Read more

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4th day of missed period (30 day cycle). Getting pregnancy symptoms but negative hpt (strip). Also have uti. How soon can I take a blood test.?

4th day of missed period (30 day cycle). Getting pregnancy symptoms but negative hpt (strip). Also have uti. How soon can I take a blood test.?

Try another test: Most hpts are pretty sensitive and should be positive by a missed period. A negative hpt, assuming it was done correctly, is pretty accurate. If you are concerned it was false, you can do another one 48 hours later. This will save you a blood test. Two negative tests make it pretty clear it's negative. Symptoms may actually be the start of a cycle as well. The UTI shouldn't interfere with this. ...Read more

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If a woman pregnancy exam went positive in the first try, is she pregnant? And is it necessary to take a blood test exam in order to confirm it ?

If a woman pregnancy exam went positive in the first try, is she pregnant? And is it necessary to take a blood test exam in order to confirm it ?

Blood test not : Needed. A positive urine pregnancy test is generally reliable. If you have any other signs/symptoms of pregnancy, there is no need for blood test. However, you should seek antenatal care for the sake of your and your baby's health. See this site for more info. http://www.webmd.com/baby/guide/pregnancy-am-i-pregnant. ...Read more

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I want to take a blood test to know which is my blood type. Can this test detect pregnancy??

I want to take a blood test to know which is my blood type. Can this test detect pregnancy??

No: Test for blood group and pregnancy are very different tests. For good health - Have a diet rich in fresh vegetables, fruits, whole grains, low fat milk and milk products, nuts, beans, legumes, lentils and small amounts of lean meats. Avoid saturated fats. Exercise at least 150 minutes/week and increase the intensity of exercise gradually. Do not use tobacco, alcohol, weed or street drugs in any form. Practice safe sex. Get HPV vaccine. ...Read more

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What if i take a pregnancy test and it show negative once do u think I should take a blood test?

Technique & timing: You should wait 4-5 after a missed period to do home test. Use first morning urine and follow the instructions in the kit carefully. Blood tests are more sensitive and may be positive sooner. ...Read more