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.
Pregnancy tests are most reliable from the first day of your missed period, although some tests can be used as early as four or five days before your period is due. Check the packaging of your test to find out when it can be used. If you have regular periods, youâll probably know when your next period is due. If youâre not sure, itâs a good idea to wait at least three weeks after you think you may have conceived before doing a test. Read more about doing a pregnancy test.