Sperm defect severity rather than sperm source is associated with lower fertilization rates after intracytoplasmic sperm injection

71Citations
Citations of this article
23Readers
Mendeley users who have this article in their library.

Abstract

Objective: To evaluate the impact of sperm defect severity and the type of azoospermia on the outcomes of intracytoplasmic sperm injection (ICSI). Materials and Methods: This study included 313 ICSI cycles that were divided into two major groups according to the source of spermatozoa used for ICSI: 1) Ejaculated (group 1; n = 220) and 2) Testicular/ Epididymal (group 2; n = 93). Group 1 was subdivided into four subgroups according to the results of the semen analysis: 1) single defect (oligo-[O] or astheno-[A] or teratozoospermia-[T], n = 41), 2) double defect (a combination of two single defects, n = 45), 3) triple defect (OAT, n = 48), and 4) control (no sperm defects; n = 86). Group 2 was subdivided according to the type of azoospermia: 1) obstructive (OA: n = 39) and 2) non-obstructive (NOA: n = 54). Fertilization (2PN), cleavage, embryo quality, clinical pregnancy and miscarriage rates were statistically compared using one-way ANOVA and Chi-square analyses. Results: Significantly lower fertilization rates were obtained when either ejaculated sperm with triple defect or testicular sperm from NOA patients (63.4 ± 25.9% and 52.2 ± 29.3%, respectively) were used for ICSI as compared to other groups (∼73%; P < 0.05). Epididymal and testicular spermatozoa from OA patients fertilized as well as normal or mild/moderate deficient ejaculated sperm. Cleavage, embryo quality, pregnancy and miscarriage rates did not differ statistically between ejaculated and obstructive azoospermia groups. However, fertilization, cleavage and pregnancy rates were significantly lower for NOA patients. Conclusion: Lower fertilization rates are achieved when ICSI is performed with sperm from men with oligoasthenoteratozoospermic and non-obstructive azoospermic, and embryo development and pregnancy rates are significantly lower when testicular spermatozoa from NOA men are used.

Cite

CITATION STYLE

APA

Verza, S., & Esteves, S. C. (2008). Sperm defect severity rather than sperm source is associated with lower fertilization rates after intracytoplasmic sperm injection. International Braz J Urol, 34(1), 49–56. https://doi.org/10.1590/s1677-55382008000100008

Register to see more suggestions

Mendeley helps you to discover research relevant for your work.

Already have an account?

Save time finding and organizing research with Mendeley

Sign up for free