You can still register with us as a potential blood stem cell donor during your pregnancy as long as you fulfill the other requirements for donor suitability. Please let us know whether you are pregnant and what your due date is. From this time and generally, one year after the birth (nursing and recovery time), you will not be able to donate your blood stem cells. After this period has ended, you will once again be able to be matched with a patient searching for an unrelated donor unless we hear otherwise from you.