Keywords: ناباروری کولینرژیک; Cholinergic innervation; Choline acetyltransferase; Acetyl cholinesterase; Cerebral cortex; Hippocampus; Alzheimer's disease; Inervación colinérgica; Colina acetiltransferasa; Acetilcolinesterasa; Corteza cerebral; Hipocampo; Enfermedad de Alzheimer;