When trying to determine if you are pregnant which is a better method a box test or blood test? can a box be neg and you really are pregnant?

Pregnancy Tests: One kit, the first response early result pregnancy test, emerged as the most reliable and sensitive test. "it detected HCG at concentrations as low as 6.5 miu/ml (thousandths of an international unit per milliliter) - that's almost sensitive enough to detect any pregnancy soon after implantation, " consumer reports wrote. "most other kits were far less sensitive ".

Blood test better: Conception occurs within day or so of the sex. It takes about 3 weeks for the embryo to make enough HCG for 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.