Yes. This is most often used when needing a blood transfusion for an operation.
The patient can donate his or her own blood, which is then stored until needed.
Their is a short period for usage, so you can't donate too far in advance!
Self government
Auto
Self government
Autologous blood (from the patient)
advance banking of blood by the patient (known as autologous donation)
An autologous breast reconstruction uses the woman's own tissues
Autologous graft or autologous transplant.
derived from
it might be referring to the type of sight used on the gun (holographic sight), not the gun its self.
Autologous
Transfusion of your own blood (autologous) is the safest method but requires advance planning and not all patients are eligible.
If you are referring to masturbation, then yes, they can.