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Clinical and Experimental Obstetrics & Gynecology  2015, Vol. 42 Issue (5): 653-656    DOI: 10.12891/ceog1971.2015
Original Research Previous articles | Next articles
The oocyte-to-baby rate of day 2, day 3 versus day 5 embryo transfer: a retrospective study
H.X. Wu1, K.M. Li1, L. Ai2, J.P. Pan1, Y. Wang1, X.M. Teng1, *()
1Department of Reproductive Medicine, Shanghai First Maternity and Infant Hospital, Tongji University School of Medicine, Shanghai
2Department of Reproductive Medicine, Jinjiang Hospital of Obstetrics & Gynecology, Chengdu, Sichuan (China)
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Abstract  
Objectives: To investigate whether the time of embryo transfer (ET) affect the oocyte-to-baby rate. Materials and Methods: The database was retrospectively analyzed including total number of oocytes collected and corresponding oocyte-to-live baby born (LBB) rate. Then the relationship between different time of embryo transfer and oocyte-to-baby rate was compared. In a year period all patients undergoing infertility treatment were included in the study. The outcome parameters were total number of oocytes collected and corresponding oocyte-to-LBB. Results: For patients under the age of 35 years, there was no increase in oocyte-to-LBB regardless of the time of ET. For patients older than 35 years, the oocyte use rate increased significantly when embryo was transferred on day 2. Oocyte-tobaby rates were also analyzed after grouping patients on the number of oocytes retrieved per cycle. For patients < 35 years, the oocyteto- LBB rate increased significantly on day 3 if < ten oocytes were obtained. whereas for patients > 35 years, the oocyte-to-baby rate was best on day 2 when about 15 oocytes were retrieved. Conclusions: This retrospective analysis demonstrated the relationship between the time of ET and ooctye-to-baby rate that is indicative of a more biologically efficient reproductive system.
Key words:  Oocyte      In vitro fertilization      Time of embryo transfer      Live birth rates     
Published:  10 October 2015     
*Corresponding Author(s):  X.M. TENG     E-mail:  tengxiaoming@hotmail.com

Cite this article: 

H.X. Wu, K.M. Li, L. Ai, J.P. Pan, Y. Wang, X.M. Teng. The oocyte-to-baby rate of day 2, day 3 versus day 5 embryo transfer: a retrospective study. Clinical and Experimental Obstetrics & Gynecology, 2015, 42(5): 653-656.

URL: 

https://ceog.imrpress.com/EN/10.12891/ceog1971.2015     OR     https://ceog.imrpress.com/EN/Y2015/V42/I5/653

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