1. Mechanism of testicular descent

   • F. Hadziselimović

   Editorial Pages: 155 - 157

2. Leydig cell hyperplasia in cryptorchid patients: Quantitative evaluation of Leydig cells in undescended and contralateral scrotal testes

   • M. Gotoh
   • K. Miyake
   • H. Mitsuya

   Originals Pages: 159 - 164

3. The influence of epididymal agenesis on the development and maturation of the testis: Experimental model and clinical correlations

   • R. McCullough
   • F. F. Marshall
   • C. Detweiler

   Originals Pages: 165 - 170

4. The value of testicular biopsy in cryptorchidism

   • F. Hadžiselimović
   • E. Hecker
   • B. Herzog

   Originals Pages: 171 - 174

5. Unresponsiveness of the reproductive organs of the male mouse to treatment with a potent luteinizing hormone-releasing hormone agonist (ICI-118,630)

   • G. J. van Steenbrugee
   • J. C. Romijn
   • F. H. Schröder

   Originals Pages: 175 - 178

6. Assessment of immunological mechanism in infertility of the rat after experimental testicular torsion

   • E. Merimsky
   • R. Orni-Wasserlauf
   • I. Yust

   Originals Pages: 179 - 182

7. Testicular blood flow in experimental torsion and epididymo-orchitis measured by ¹³³Xe clearance technique in rabbits

   • S. E. Ünlüer
   • M. T. Ercan
   • A. Akdas

   Originals Pages: 183 - 186

8. Effect of gossypol on bull spermatozoa in vitro

   • E. Rovan
   • N. R. Kalla
   • H. Adam

   Originals Pages: 187 - 192

9. Announcements

   Announcement Pages: 193 - 194