How many weeks pregnant do you have to be before a blood test would come back positive?

Answer 1

As soon as the fertilized egg starts to implant the HCG levels start to rise and that's what tells a doctor that you are pregnant. This happens a few days after conception so a blood test could tell you right away, so you would be about 3 weeks pregnant, since the first 2 weeks of a pregnancy you aren't really pregnant. My urine test came back positive 9 days before my period was due, and the blood test at the doctors a few days later confirmed it.

Answer 2

Well I know with a urine sample fewer than fourteen days after conception and as early as the first day you've missed your period. Results, however, are more accurate if you wait until your period is a least a few days late and one or two weeks late may even be better. Blood test can detect pregnancy with virtually 100 percent accuracy as early as one week after conception.

Answer 3

I think it's one week. It doesn't take long for a blood test to show up positive.

Answer 4

i might want to say the blood try is authentic. a house being pregnant try is in accordance with a volume of a particular hormone on your urine, which is also at severe stages at the same time as your are at certain situations of the month. i might want to attend a week and take yet another blood you would possibly want to be particular, yet i might want to say that your no longer pregnant. Your recommendations can make you flow by ability of each and every of the indicators of being pregnant however in case your no longer. i might want to easily wait a week, take yet another try and then flow by technique of what ever that try says. solid success!!

Answer 5

1 week

Answer 6

you have to waite two weeks from the last time you had sex

Answer 7

1 week...