SynthesisJournal of assisted reproduction and genetics2020
Impact on using cryopreservation of testicular or epididymal sperm upon intracytoplasmic sperm injection outcome in men with obstructive azoospermia: a systematic review and meta-analysis.
Synthesis in Journal of assisted reproduction and genetics, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 9 papers.
What it found
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
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Who cites it
9 citing papers in PubMed, 19 citations in OpenAlex.
- Intraoperative epididymal sperm cryopreservation during microsurgical vasoepididymostomy for obstructive azoospermia: intracytoplasmic sperm injection outcomes from a single-center cohort.Translational andrology and urology · 2026Article
- Fresh versus frozen micro-TESE sperm and outcomes.Asian journal of andrology · 2025Review
- Idiopathic male infertility - what are we missing?Arab journal of urology · 2025Article
- Pregnancy outcomes in patients with non-obstructive azoospermia undergoing micro-TESE: comparison of fresh vs. frozen-thawed testicular sperm.Journal of assisted reproduction and genetics · 2024Article
- Bridging the Gap: Animal Models in Next-Generation Reproductive Technologies for Male Fertility Preservation.Life (Basel, Switzerland) · 2023Review
- What Does Intracytoplasmic Sperm Injection Change in Embryonic Development? The Spermatozoon Contribution.Journal of clinical medicine · 2023Review
- Comparison of pregnancy and neonatal outcomes of intracytoplasmic sperm injection performed with frozen versus fresh testicular sperm.Translational andrology and urology · 2022Article
- Comparative Clinical Study of Percutaneous Epididymal Sperm Aspiration and Testicular Biopsy in the Outcome of ICSI-Assisted Fertility Treatment in Patients with Obstructive Azoospermia.Frontiers in surgery · 2022Article
- Laser-assisted selection of immotile spermatozoa has no effect on obstetric and neonatal outcomes of TESA-ICSI pregnancies.Reproductive biology and endocrinology : RB&E · 2021Article
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
8 authors at 3 institutions in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
purposeTo determine whether there was a significant impact on using cryopreservation of testicular or epididymal sperm upon the outcomes of intracytoplasmic sperm injection (ICSI) in patients with obstructive azoospermia (OA).
methodSystematic review and meta-analysis of 20 retrospective studies in databases from January 1, 1995, to June 1, 2020.
resultTwenty articles were included in this study. A total of 3602 (64.1%) of 5616 oocytes injected with fresh epididymal sperm were fertilized, compared with 2366 (61.2%) of 3862 oocytes injected with cryopreserved sperm (relative risk ratio (RR) 0.96, 95% confidence interval (CI) (0.90, 1.02), P > 0.05). A total of 303 (44.1%) of 687 ICSI cycles using fresh epididymal sperm resulted in a clinical pregnancy, compared with 150 (36.6%) of 410 ICSI cycles using cryopreserved epididymal sperm (RR 0.84, 95% CI (0.72, 0.97), P < 0.05). In the testis, a total of 2147 (68.7%) of 3125 oocytes injected with fresh sperm were fertilized, compared with 1623 (63.5%) of 2557 oocytes injected with cryopreserved sperm (RR 0.97, 95% CI (0.90, 1.06), P > 0.05). A total of 151 (47.8%) of 316 ICSI cycles using fresh testicular sperm resulted in a clinical pregnancy, compared with 113 (38.2%) of 296 ICSI cycles using cryopreserved sperm (RR 0.87, 95% CI (0.72, 1.05), P > 0.05).
conclusionsIn men with OA, there was a statistical lower clinical pregnancy rate (CPR) by using frozen epididymal sperm compared with fresh epididymal sperm, but showing no difference on fertilization rate (FR). Additionally, FR and CPR were not affected by whether the retrieved testicular sperm was frozen or fresh.
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