PGD

PGD may refer to:

==Science and medicine== Patient group directions, documents in the National Health Service of England Platform gate doors, a term referring to waist or chest height platform screen doors Preimplantation genetic diagnosis, genetic profiling of embryos prior to implantation Primary graft dysfunction, a complication of organ transplantation Prolonged grief disorder, a syndrome consisting of a distinct set of symptoms following the death of a loved one Proper generalized decomposition, a numerical method for solving boundary value problems Projected gradient descent, an optimization algorithm