Original Article : Clinical outcomes of vitrified-thawed embryo transfer using a pull and cut straw method
의약학 > 산부인과학
( Joon Gyo Lim ) , ( Young Tae Heo ) , ( Seung Gi Min ) , ( Byeong Yeol Min ) , ( Sang Jun Uhm ) , ( Nam Hyung Kim )
Obstetrics & Gynecology Science 2013년, 제56권 제3호, 182~189페이지(총8페이지)
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    Objective To compare the clinical outcomes of patients with vitrified-thawed embryos transferred using either the 0.25 mL straw method and the pull and cut straw (PNC) method. To evaluate the clinical outcomes of patients with transferred embryos that underwent assisted hatching at the cleaved embryo (day 3) or the blastocyst (day 5) stage. Methods The study population consisted of women who underwent vitrified-warmed embryo transfer between May 2000 and December 2011 and assisted hatching was performed after warming of embryos. Cycles of thawing between assisted hatching treated and non treated groups were compared for survival and pregnancy rates. Results The PNC vitrification method improved survival and pregnancy rates in partial lysed embryos. While assisted hatching did not affect the developmental and clinical pregnancy rates of the vitrified-warmed blastocyst group, it did increase the pregnancy rate of poor quality vitrified-warmed cleaved embryos. Conclusion These results suggest that PNC may increase the number of clinical pregnancies via the vitrification of both cleaved embryos and blastocysts. In addition, selective assisted hatching treatment of embryos that show a poor prognosis after warming may increase the rate of clinical pregnancy.
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