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Zona pellucida thickness and clinical pregnancy outcome following in vitro fertilization
Author(s) -
Sun Y.P.,
Xu Y.,
Cao T.,
Su Y.C.,
Guo Y.H.
Publication year - 2005
Publication title -
international journal of gynecology and obstetrics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.895
H-Index - 97
eISSN - 1879-3479
pISSN - 0020-7292
DOI - 10.1016/j.ijgo.2005.02.012
Subject(s) - medicine , human fertilization , embryo , in vitro fertilisation , zona pellucida , pregnancy , embryo transfer , analysis of variance , andrology , pregnancy rate , gynecology , obstetrics , biology , anatomy , oocyte , genetics , microbiology and biotechnology
Objective To investigate possible correlations of ZPT or ZPTV with clinical outcome following in vitro fertilization. Methods Two hundred forty‐six embryos were selected for transfer on day 3 with clear image record from 81 IVF–ET cycles. The laser system measurement software was used to measure the ZTP value of each embryo and the ZPTV was computed. Statistical analysis was done using the ANOVA or Chi‐square test. Results Both ZPT and ZPTV declined with women's age. The mean ZPTV of embryos from patients between 30 and 34 years old was significantly higher than that from patients older than 35 ( P < 0.001). The ZPTV in pregnancy group was significantly higher than that in nonpregnancy group( P < 0.005). The clinical pregnancy rate in the group with ZPTV more than 20% was significantly higher than that in the group with ZPTV less than 20% ( P < 0.05). The ZPTV of high grade embryos was significantly higher than that of low grade embryos ( P < 0.001). Conclusions ZPTV rather than ZPT is an effective parameter to evaluate the embryo quality. Increasing the ZPTV may enhance embryo implantation potential.