Vol. 1, Issue 1, / January-March 2000
(Original Article, pages 24-30)

Robabeh Taheripanah Corresponding Author
- Reproductive Biotechnology Research Center, Avicenna Research Institute, ACECR, Tehran, Iran
Mohammad Ali Karimzadeh Meybodi
- Department of Obstet . and Gynecol . of Shahid Sadughi Medical Science of Yazd, Yazd, Iran
Abbas Aflatoonian
- Department of Obstet . and Gynecol . of Shahid Sadughi Medical Science of Yazd, Yazd, Iran
Mohammad Hossein Amirarjmand
- Shahid Sadoughi of Yazd Medical Sciences University , Yazd, Iran

Received: 1/8/2000 Accepted: 2/20/2000 - Publisher : Avicenna Research Institute

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Introduction: The aim of this study was to determine the effects of maternal age in fertilization rate of intracytoplasmic sperm injection comparison with IVF. Material and Methods: In this prospective clinical trial study, 200 couples with male subinfertility that referred to infertility clinic were enrolled. Couples were selected on the basis of semen parameters and divided randomly into two groups of IVF and ICSI. Couples were divided into different subgroups based on age of females The fertilization rate of every subgroups were assessed and compared together. Results were analyzed by Chi-square method. Results: After induction ovulation with standard protocols, 525 oocytes were retrieved during egg collection in ICSI groups versus 474 in IVF. After selection of good quality oocytes, IVF and ICSI was done as routine The fertilization rate of every age group was measured and compared with age increased. In IVF group, the fertilization rate was 41.3% in patients <35 years versus 26.7% in older than 35 years old The mean fertilization rate was 89.3% in patients <35 comparison with 75.2% in women >35 years old by ICSI On the other hand the mean cleavage rate of IVF cycles was significantly lower in patients >35 years in IVF (49.5%) versus younger patients (P value<0.001) but this finding was not observed by ICSI (85.17% VS 85.15%).Reduction of fertilization rate with increase of female age was statistically meaningful (Pvalue <0.001) in IVF and ICSI. Conclusion: These findings suggest that fertilization of oocyte reduce consequently with maternal age increased. therefore, ICSI can not overcome this problem their cause is not clear and may refer to chromosomal or structural abnormality in oocytes.


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