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.
For confirming pregnancy, the timing of testing depends on how accurate a woman is about the day she expects her menstrual period as well as the method used for testing. In general, blood tests are more sensitive than urine tests and can be done two days before a woman would expect her period to start.A urine or blood hCG test can be done reliably by 10 days after a missed menstrual period.Even using a urine test, a woman may be able to determine whether she is pregnant the day she misses her period, but the result could be falsely negative.ccasionally, an hCG test is used to screen for pregnancy if a woman is to undergo a medical treatment, be placed on certain drugs, or have other testing, such as x-rays, that might harm the developing baby. This is usually done to help confirm that the woman is not pregnant.