You may need a transfusion of red blood cells if you have lost a lot of blood or your red blood cell count is low (anemia). You may need a platelet transfusion if your platelet count is low (thrombocytopenia). White blood cell transfusions are rare and are only done in very specific situations.
1 So, the earlier after a missed period you take a HPT, the harder it is to spot the hCG. 2  If you wait one week after a missed period to test, you are more apt to have an accurate result. 3  Also, testing your urine first thing in the morning may boost the accuracy. When you use them â The amount of hCG in a pregnant womanâs urine increases with time. 2  So, the earlier after a missed period you take a HPT, the harder it is to spot the hCG. 3  If you wait one week after a missed period to test, you are more apt to have an accurate result.
1 The earlier after a missed period that you take a home pregnancy test, the harder it is for the test to detect HCG. 2  For the most accurate results, take the test one week after a missed period â when the level of HCG in your urine is most likely to be detectable. Your home pregnancy test is negative. 2  If your period doesn't begin, repeat the test in a few days or one week â especially if you took the test before or shortly after a missed period. 3  You continue to get negative test results, but your period doesn't begin or you still think you might be pregnant.