The reproductive cycle in male noctule bats, Nyctalus noctula.

Adipose Tissue, Brown/analysis Adrenal Glands/anatomy & histology Androgens/analysis Animals Body Weight Bulbourethral Glands/anatomy & histology Castration Chiroptera/physiology Epididymis/anatomy & histology Fructose/analysis Genitalia, Male/physiology Hibernation Male Organ Size Pituitary Gland/anatomy & histology Seasons Sexual Behavior, Animal Spermatogenesis Testis/anatomy & histology Testosterone/analysis,blood Thyroid Gland/anatomy & histology

Androgens Fructose Testosterone