The duties of ethical committees applied to human reproduction Vered H. EisenbergJoseph G. Schenker News And Views Pages: 689 - 697
The significance of elevated progesterone at the time of administration of human chorionic gonadotropin may be related to luteal support K. F. MillerE. J. BehnkeS. G. Awadalla Clinical Assisted Reproduction Pages: 698 - 701
Maternal serum creatine kinase does not predict tubal pregnancy Stephen R. LincolnJames R. DockeryBryan D. Cowan Clinical Assisted Reproduction Pages: 702 - 704
The predictive value of an initial serum β human chorionic gonadotropin level for pregnancy outcome following in vitro fertilization Suna M. QasimCarrie CallanJung K. Choe Clinical Assisted Reproduction Pages: 705 - 708
Effect of a programmed short-term stimulation protocol on the replacement of cryopreserved embryos Bruno ImthurnErvin MacasPaul J. Keller Clinical Assisted Reproduction Pages: 709 - 712
Pregnancy achieved with pronuclear-stage embryos that were cryopreserved and thawed twice: A case report My BakerJerome H. CheckInda M. Hoover Clinical Assisted Reproduction Pages: 713 - 715
Simultaneous program of natural-cycle in vitro fertilization and cryopreserved-thawed embryo transfer Seok Hyun KimChung Hoon KimYoon Seok Chang Clinical Assisted Reproduction Pages: 716 - 721
Improved human zygote development in a modified Ham's F10 medium in vitro Maha M. MahadevanMichael M. MillerDean M. Moutos Clinical Assisted Reproduction Pages: 722 - 725
Could in vitro fertilization with a modified sperm preparation technique be an option to micromanipulations? Christiane WittemerJeanine OhlPierre Dellenbach Andrology Pages: 726 - 730
Twin pregnancy following IVF treatment using frozen-thawed retrograde ejaculated sperm J. I. TayA. WhiteheadA. J. Rutherford Andrology Pages: 731 - 732
Quality control in IVF with mouse bioassays: A four years' experience M. van den BerghI. BaszóY. Englert Animal Experimentation Pages: 733 - 738
A partial hydatidiform mole with 2N/3N mosaicism identified by molecular analysis Yuichiro IkedaYoshihiro JinnoTadayuki Ishimaru Genetics Pages: 739 - 744
Short-term gonadotropin suppression with oral contraceptives benefits poor responders prior to controlled ovarian hyperstimulation Steven R. LindheimDavid H. BaradMark V. Sauer Short Communication Pages: 745 - 747
Response to slotnich and ortega [monoamniotic twinning and zone manipulation: A survey of U.S. IVF centers correlating zona manipulation procedures and high-risk twinning frequency (J Assist Reprod Genet 1996;13:381–385)] David R. MeldrumMinda Hamilton Letter To The Editor Pages: 748 - 748