Elective single embryo transfer: Comparison of blastocyst and cleavage-stage embryo transfer
| Autor: | Makiko Kawamura, Toshihiro Kawamura, Seika Ishikawa, Akane Arichi, Sachiko Ikumi, Michiko Mori, Yasuhiro Karasawa, Yuko Tajima, Kahori Suga |
|---|---|
| Rok vydání: | 2005 |
| Předmět: |
Pregnancy
In vitro fertilisation business.industry medicine.medical_treatment Blastocyst Transfer Single Embryo Transfer Cell Biology medicine.disease Intracytoplasmic sperm injection Embryo transfer Andrology medicine.anatomical_structure Reproductive Medicine Embryo cryopreservation embryonic structures medicine Blastocyst business |
| Zdroj: | Reproductive Medicine and Biology. 4:197-201 |
| ISSN: | 1445-5781 |
| DOI: | 10.1111/j.1447-0578.2005.00105.x |
| Popis: | Blastocysts are reportedly suitable for preventing multiple pregnancies as a result of the high implantation rate per embryo. The present study compared clinical results for elective single embryo transfer (ET) between blastocysts and cleavage-stage embryos in order to ascertain the usefulness of blastocyst culturing in single ET Between January 2002 and December 2004, conventional in vitro fertilization ET and/or intracytoplasmic sperm injection was carried out for single ET in 86 cycles, to prevent multiple pregnancies (for medical reasons or because of patient wishes). Among the 80 cycles in which a fresh embryo was transferred, pregnancy/implantation rates per ET were 35.3% for day 2/3 ET and 50.0% for day 5 ET, and pregnancy/ implantation rates per oocyte retrieval were 35.3% for day 2/3 ET and 44.2% for day 5 ET Ongoing pregnancy/delivery rates per oocyte retrieval were 32.4% for day 2/3 ET and 38.5% for day 5 ET Monozygotic twinning occurred in one case of day 5 ET. Pregnancy rates per single ET tended to be higher for day 5 ET than for day 2/3 ET. However, no marked differences were identified in ongoing pregnancy/delivery rates per oocyte retrieval between groups. |
| Databáze: | OpenAIRE |
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