Intracytoplasmic sperm injection(ICSI)efficiently addresses male factor infertility.However,the occurrence of abnormal fertilization,mainly characterized by abnormal pronuclei(PN)patterns,merits investigation.To inves...Intracytoplasmic sperm injection(ICSI)efficiently addresses male factor infertility.However,the occurrence of abnormal fertilization,mainly characterized by abnormal pronuclei(PN)patterns,merits investigation.To investigate abnormal fertilization patterns following ICSI and identify their respective associations with abnormal parameters in semen analysis(SA),a retrospective observational study including 1855 cycles was performed.Male infertility diagnosis relied on the 2010 WHO criteria.The population was divided into groups based on their SA results.The presence of 2PNs and extrusion of the second polar body(PB)indicated normal fertilization.A Kruskal–Wallis test along with a Wilcoxon post hoc evaluation and Bonferroni correction was employed for comparison among the groups.For the pregnancy rate,logistic regression was employed.No correlation was established between the SA abnormalities and the 1PN or 3PN formation rates.The highest and lowest 0PN rates were reported for the oligoasthenoteratozoospermic and normal groups,respectively.The lowest cleavage formation rates were identified in the oligoasthenozoospermic and oligoasthenoteratozoospermic groups.The aforementioned groups along with the oligoteratozoospermic group similarly presented the lowest blastocyst formation rates.For the clinical pregnancy rate,no statistically significant difference was observed.In conclusion,the incidence of two or more abnormal SA parameters–with the common denominator being oligozoospermia–may jeopardize normal fertilization,cleavage,and blastocyst rates.Once the developmental milestone of achieving blastocyst stage status was achieved,only oligoasthenozoospermia and oligoasthenoteratozoospermia were associated with lower rates.Interestingly,following adjustment for the number of blastocysts,no statistically significant differences were observed.展开更多
Longo and CHEN elucidated in 1985 that the origin of polarity of mouse oocytes, the germinal vesicle breakdown and resumption of meiosis are temporospatially related to one another, and further demonstrated the respon...Longo and CHEN elucidated in 1985 that the origin of polarity of mouse oocytes, the germinal vesicle breakdown and resumption of meiosis are temporospatially related to one another, and further demonstrated the responsibility of microfilaments for the peripheral movement of the meiotic apparatus including chromosomes. Recently, it has been shown by CHEN et al. that the chromosomal movement of the mitotic apparatus at the ear-展开更多
文摘Intracytoplasmic sperm injection(ICSI)efficiently addresses male factor infertility.However,the occurrence of abnormal fertilization,mainly characterized by abnormal pronuclei(PN)patterns,merits investigation.To investigate abnormal fertilization patterns following ICSI and identify their respective associations with abnormal parameters in semen analysis(SA),a retrospective observational study including 1855 cycles was performed.Male infertility diagnosis relied on the 2010 WHO criteria.The population was divided into groups based on their SA results.The presence of 2PNs and extrusion of the second polar body(PB)indicated normal fertilization.A Kruskal–Wallis test along with a Wilcoxon post hoc evaluation and Bonferroni correction was employed for comparison among the groups.For the pregnancy rate,logistic regression was employed.No correlation was established between the SA abnormalities and the 1PN or 3PN formation rates.The highest and lowest 0PN rates were reported for the oligoasthenoteratozoospermic and normal groups,respectively.The lowest cleavage formation rates were identified in the oligoasthenozoospermic and oligoasthenoteratozoospermic groups.The aforementioned groups along with the oligoteratozoospermic group similarly presented the lowest blastocyst formation rates.For the clinical pregnancy rate,no statistically significant difference was observed.In conclusion,the incidence of two or more abnormal SA parameters–with the common denominator being oligozoospermia–may jeopardize normal fertilization,cleavage,and blastocyst rates.Once the developmental milestone of achieving blastocyst stage status was achieved,only oligoasthenozoospermia and oligoasthenoteratozoospermia were associated with lower rates.Interestingly,following adjustment for the number of blastocysts,no statistically significant differences were observed.
基金Project partly supported by the National Natural Science Foundation of China and the Rockefeller Foundation of USA.
文摘Longo and CHEN elucidated in 1985 that the origin of polarity of mouse oocytes, the germinal vesicle breakdown and resumption of meiosis are temporospatially related to one another, and further demonstrated the responsibility of microfilaments for the peripheral movement of the meiotic apparatus including chromosomes. Recently, it has been shown by CHEN et al. that the chromosomal movement of the mitotic apparatus at the ear-
