Nechansky S, Stöckl W, Skolek R, Möstl E, Choi H S, Bamberg E
Experientia. 1980 Sep 15;36(9):1131-4. doi: 10.1007/BF01966012.
After active immunization of male rabbits against androstenedione and with increasing antibody titre the concentration of androstenedione and testosterone in peripheral blood increased more than 1000-fold resp. 20-fold above values of control animals. On histological examination of the testes a marked Leydig's cell hyperplasia was found, though there was no difference in testis weight.