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.
Many home pregnancy tests claim to be 99 percent accurate. However, research suggests that many home pregnancy tests are not sensitive enough to diagnose pregnancy in women who have recently missed a period. For the most reliable results, wait to take the test until one week after your missed period.