1. Comparison of the in vitro fertilization rate by human sperm capacitated by multiple-tube swim-up and Percoll gradient centrifugation

   • Nongnuj Tanphaichitr
   • Alan Agulnick
   • Melvin Taymor

   Special Contributions Pages: 119 - 122

2. Blocking effect of sperm immobilizing antibodies on sperm penetration of human zonae pellucidae

   • Shinichi Tsukui
   • Yoichi Noda
   • Takahide Mori

   Special Contributions Pages: 123 - 128

3. Human follicular fluid: Prolactin is biologically active and ovum fertilization correlates with estradiol concentration

   • Marappa G. Subramanian
   • Anthony G. Sacco
   • Richard R. Gala

   Special Contributions Pages: 129 - 133

4. Is the sperm-binding capability of the zona pellucida linked to its surface structure? A scanning electron microscopic study of human in vitro fertilization

   • Giuseppe Familiari
   • Stefania A. Nottola
   • Pietro M. Motta

   Special Contributions Pages: 134 - 143

5. Mouse embryo quality control for toxicity determination in the Norfolk in vitro fertilization program

   • Jeanne S. McDowell
   • R. James Swanson
   • Lucinda Veeck

   Special Contributions Pages: 144 - 148

6. The temporal effects of changes in in vitro fertilization culture media on the one-cell mouse embryo system

   • Ady Davidson
   • Michael Vermesh
   • Richard J. Paulson

   Special Contributions Pages: 149 - 152

7. Programmed ovulation induction and oocyte retrieval for in vitro fertilization

   • J. Salat-Baroux
   • J. M. Antoine
   • M. Plachot

   Special Contributions Pages: 153 - 157

8. The effect of fibrin sealant on mouse embryos

   • F. A. Rodrigues
   • J. H. J. Van Rensburg
   • E. W. W. Sonnendecker

   Special Contributions Pages: 158 - 160

9. Tripling of serum progesterone (P4) and embryonic morphological features in conception and nonconception cycles, after human in vitro fertilization

   • Christopher H. C. Hsiung
   • William G. Karow
   • Tigris T. Y. Lee

   Special Contributions Pages: 161 - 166

10. The effect of the incubation temperature on the cleavage rate of mouse embryos in vitro

    • Gad Lavy
    • Michael P. Diamond
    • Alan H. Decherney

    Special Contributions Pages: 167 - 170

11. Purification of water for in vitro fertilization and embryo transfer

    • Judy Fleetham
    • Maha M. Mahadevan

    Special Contributions Pages: 171 - 174

12. Pregnancies following the interval double-transfer technique in an in vitro fertilization-embryo transfer program

    • H. Abramovici
    • M. Dirnfeld
    • M. Sheinfeld

    Short Communication Pages: 175 - 176

13. In vitro fertilization and embryo transfer at the Assaf Harofe Medical Center, Israel

    • E. Caspi
    • R. Ron-El
    • Z. Weintraub

    Letter to the Editors Pages: 177 - 177

14. Registry

    Announcement Pages: 178 - 178