Fu J, Wang XJ, Wang YW, Sun J, Gemzell-Danielsson K, Sun XX. The influence of early cleavage on embryo developmental potential and IVF/ICSI outcome.
J Assist Reprod Genet 2009;
26:437-41. [PMID:
19789972 DOI:
10.1007/s10815-009-9342-6]
[Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2009] [Accepted: 08/28/2009] [Indexed: 11/28/2022] Open
Abstract
PURPOSE
To observe whether early cleavage can be a predictor of embryo developmental potential, pregnancy and implantation rates.
METHODS
A total of 9,544 embryos in 1,095 in vitro fertilization or intracytoplasmic sperm injection cycles were observed with regard to the appearance of early cleavage at 25-29 h post-insemination.
RESULTS
A significantly higher proportion of excellent quality embryos were observed in the early cleavage group compared to the late cleavage group (52.5 versus 28.9%, P < 0.01). In the early cleavage group there was also a higher rate of pregnancy per transfer compared with the late cleavage group (38.7 versus 26.3%, P < 0.01). In addition, we found that transfer of only one early cleavage embryo resulted in a high pregnancy rate (38.5%) and a low multiple pregnancy rate (18.0%).
CONCLUSION
Early cleavage is a strong indicator of embryo quality, and may be used as an additional criterion in the selection of embryos for transfer to increase pregnancy rate and reduce multiple pregnancy rate.
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