1. What's the best approach for unexplained infertility?

   • Steven J. Ory

   Editorial Pages: 273 - 274

2. Immediate versus delayed progesterone supplementation in gamete intrafallopian transfer (GIFT)

   • Shiuh-Young Chang
   • Yung-Kuei Soong
   • Der-Yan Hsiu

   Special Contributions Pages: 275 - 279

3. Glass wool-filtered spermatozoa and their oocyte penetrating capacity

   • N. Rana
   • R. S. Jeyendran
   • L. J. D. Zaneveld

   Special Contributions Pages: 280 - 284

4. High-dose follicle-stimulating hormone (FSH) ovarian stimulation in low-responder patients for in vitro fertilization

   • Glen E. Hofmann
   • James P. Toner
   • Georgeanna S. Jones

   Special Contributions Pages: 285 - 289

5. Impact of leuprolide acetate on the response to follicular stimulation for in vitro fertilization in patients with normal basal gonadotropin levels

   • Robert G. Brzyski
   • Georgeanna S. Jones
   • Suheil J. Muasher

   Special Contributions Pages: 290 - 293

6. The occurrence of ectopic pregnancy with and without clomiphene citrate use in assisted and nonassisted reproductive technology

   • Richard P. Dickey
   • Robert Matis
   • Phillip H. Rye

   Special Contributions Pages: 294 - 297

7. Gamete intrafallopian transfer vs superovulation with intrauterine insemination for the treatment of infertility

   • Carolyn R. Kaplan
   • David L. Olive
   • Robert S. Schenken

   Special Contributions Pages: 298 - 304

8. Establishment of pregnancy after embryo transfer in mares with gonadal dysgenesis

   • Katrin Hinrichs
   • Fernando L. Riera
   • Lynne R. Klunder

   Special Contributions Pages: 305 - 309

9. Screening test for mouse blastocysts as an index of the vitality of embryos

   • Satoru Chida
   • Liselotte Mettler

   Short Communications Pages: 310 - 312

10. Elective preembryo cryopreservation in ovarian hyperstimulation syndrome

    • Nazar N. Amso
    • Kamal K. Ahuia
    • Robert W. Shaw

    Short Communications Pages: 312 - 314

11. Uniform assessment of success rates with assisted reproductive technology

    • Douglas M. Saunders
    • Martin M. Quigley
    • Norbert Gleicher

    Letters to the Editors Pages: 315 - 316

12. Clinical results of the in vitro fertilization (IVF) and gamete intrafallopian transfer (GIFT) program at the University of Iowa Hospitals and Clinics, Iowa city

    • Diane Hammitt
    • Craig Syrop
    • James Donovan

    Letters to the Editors Pages: 316 - 317

13. Registry

    Announcement Pages: 318 - 318

14. Announcements

    Announcement Pages: 319 - 319