For  risk of fetal maternal hemorrhage, such as blunt abdominal trauma
Risk = >4-12wks
Duration effect: 12wks
Also given to Rh- male trauma patients who receive O+ blood to prevent future reaction with O+ transfusions
Rho
Limp 
CURB-65
Tdap
Hirudins
PALS 
MHH-TMC
Reflexes