RT info:eu-repo/semantics/article
T1 Pregnancy with frozen-thawed and fresh testicular biopsy after motile and immotile sperm microinjection, using the mechanical touch technique to assess viability.
A1 Rodríguez Díaz, Rubí Nieves
A1 Marques de Oliveira, Neuda
A1 Vaca Sánchez, Rebeca
A1 Rodríguez Fiesta, Sonsoles
A1 López Salgado, Tomás
A1 Alberto Bethencourt, José Carlos
A1 Blanes Zamora, Raquel
K1 ICSI/immotility/pregnancy/sperm viability
AB BACKGROUND: There are few reports of pregnancy using immotile sperm, and none using a purely mechanical assessment of viability. METHODS: In this pilot study, we retrospectively analysed 66 cycles in 61 patients with determinant male factor, recording rates of fertilization, implantation, normal pregnancy and take-home babies achieved with ICSI. Sperm selection was based on morphologically normal appearance under the inverted microscope. Viability of immotile spermatozoa was assessed by the mechanical touch technique to observe tail ¯exibility and tail shape recovery. RESULTS: Of 17 ICSI cycles using frozen±thawed testicular sperm, six microinjected with immotile and 11 with motile sperm, we achieved fertilization rates of 65.7 and 74.3%, respectively, and ®ve pregnancies (two and three, respectively). Of 49 ICSI cycles using fresh testicular sperm, 10 microinjected with immotile and 39 with motile sperm, we achieved fertilization rates of 73.4 and 64.4%, respectively, and 12 pregnancies (three and nine, respectively). CONCLUSIONS: Immotile (fresh and frozen±thawed) testicular sperm of normal morphological appearance can be used to achieve clinical pregnancy with ICSI. Our results strongly suggest that immotile sperm viability can be assessed by the mechanical touch technique.
YR 2004
FD 2004
LK http://riull.ull.es/xmlui/handle/915/34981
UL http://riull.ull.es/xmlui/handle/915/34981
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DS Repositorio institucional de la Universidad de La Laguna
RD 09-may-2024