Transfer at the blastocyst stage of embryos derived from testicular round spermatid injection
| Autor: | Aycan Isiklar, Alp Nuhoglu, Ramazan Mercan, Alper Mumcu, Bulent Urman, Basak Balaban, Cengiz Alatas, Senai Aksoy |
|---|---|
| Rok vydání: | 2002 |
| Předmět: |
Male
endocrine system medicine.medical_treatment Biology Testicle Intracytoplasmic sperm injection Andrology Testis medicine Humans Blastocyst Sperm Injections Intracytoplasmic Treatment Failure reproductive and urinary physiology Cell Size Spermatid urogenital system Rehabilitation Obstetrics and Gynecology Embryo Embryo Transfer Sperm Spermatids Testicular sperm extraction Embryo transfer medicine.anatomical_structure Reproductive Medicine Fertilization embryonic structures Female |
| Zdroj: | Human reproduction (Oxford, England). 17(3) |
| ISSN: | 0268-1161 |
| Popis: | BACKGROUND: Intracytoplasmic injection of testicular round spermatids has been suggested as a salvage treatment in couples when testicular sperm extraction does not yield any mature sperm. However, the success of the procedure is debatable, and controversy surrounds issues such as the presence and (if present) identification of spermatids in testicular tissue. Progression rate to the blastocyst stage of spermatid-derived embryos appears to be low. METHODS: In this study, we investigated the feasibility and outcome of blastocyst stage embryo transfer after round spermatid injection (ROSI). ROSI was undertaken in 58 couples who did not yield mature or elongated sperm to testicular sperm extraction. RESULTS: The incidence of blastocyst formation from two pronuclear oocytes was 7.6%. A total of 16 blastocysts were transferred in 12 patients (20.7%). None of the patients conceived. CONCLUSIONS: The results of this study indicate that the blastocyst stage is reached by only very few ROSI-derived embryos and these embryos do not implant. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|