Results 51 to 60 of about 158,096 (183)

Live Births Following Zona Pellucida–Binding Sperm Selection in Recurrent Implantation Failure: Two Case Reports

Fertility & Reproduction
Recurrent implantation failure (RIF) poses a significant challenge in assisted reproductive technologies (ART). Intracytoplasmic sperm injection (ICSI), while effective for male factor infertility, bypasses natural sperm selection, potentially reducing ...
Mahin Izadi, Serajoddin Vahidi Mehrjardi, Mohammad Ali Khalili, Mohammad Ebrahim Rezvani, Behrouz Aflatoonian   +4 more
doaj   +1 more source

Is sperm morphology functionally related to sperm swimming ability? A case study in a wild passerine bird with male hierarchies

BMC Evolutionary Biology, 2018
Background Sexual selection continues after copulation via either sperm competition or cryptic female choice, and favors sperm traits that maximize sperm competitiveness.
Alfonso Rojas Mora, Magali Meniri, Sabrina Ciprietti, Fabrice Helfenstein   +3 more
doaj   +1 more source

Efficiency of Sperm Gradient Processing and HA-binding Test for the Selection of Sperm with Normal Protamine, Intact DNA and Normal Morphology [PDF]

Cell Journal, 2008
Objective: The aim of this study was to examine the efficiency of HA-binding test and sperm gradient processing method for the selection of sperm with normal protamine,intact DNA and normal morphology.Materials and Methods: The study was conducted on 29 ...
MT. Taghadosi, M. Tavalaee, SH. Razavi, M. Mardani, MH. Nasr Esfahani   +4 more
doaj  

Sperm Adhesion Molecule 1 (SPAM1) Distribution in Selected Human Sperm by Hyaluronic Acid Test

Biomedicines, 2022
The failures of binding to the oocyte zona pellucida are commonly attributed to defects in the sperm recognition, adhesion, and fusion molecules. SPAM1 (sperm adhesion molecule 1) is a hyaluronidase implicated in the dispersion of the cumulus-oocyte ...
María José Gómez-Torres, Paula Sáez-Espinosa, Paula Manzano-Santiago, Laura Robles-Gómez, Natalia Huerta-Retamal, Jon Aizpurua   +5 more
doaj   +1 more source

Long sperm fertilize more eggs in a bird [PDF]

, 2015
Sperm competition, in which the ejaculates of multiple males compete to fertilize a female's ova, results in strong selection on sperm traits. Although sperm size and swimming velocity are known to independently affect fertilization success in certain ...
Bennison, C., Birkhead, T., Hemmings, N., Slate, J.   +3 more
core   +1 more source

Practical Applications of Sperm Selection Techniques as a Tool for Improving Reproductive Efficiency

Veterinary Medicine International, 2011
Modern biotechnologies are used extensively in the animal breeding industry today. Therefore, it is essential that sperm handling procedures do not modulate the normal physiological mechanisms occurring in the female reproductive tract.
J. M. Morrell, H. Rodriguez-Martinez
doaj   +1 more source

Kinematic and spermatic recovery after selection by centrifugation in colloid solutions of ovine cryopreserved semen

Arquivo Brasileiro de Medicina Veterinária e Zootecnia
Frozen and thawed ovine semen undergo morphological and functional changes that prevent or decrease the efficiency of fertilization. Sperm selection methods seek to improve the quality and viability of the fertilizing materials.
T.G. Bergstein, L.C. Bicudo, L. Rodello, R.R. Weiss, S.D. Bicudo   +4 more
doaj   +1 more source

No Detectable Fertility Benefit from a Single Additional Mating in Wild Stalk-Eyed Flies [PDF]

, 2010
Background: Multiple mating by female insects is widespread, and the explanation(s) for repeated mating by females has been the subject of much discussion.
A Bretman, A Hingle, A Hingle, AD Stutt, AJ Bateman, CA Grant, CL Boggs, CL Fry, CW Lamunyon, D Burkhardt, DC Presgraves, DJ Hosken, DM Orsetti, DW Rogers, DW Rogers, DW Rogers, DW Rogers, Elisabeth Harley, G Arnqvist, GS Wilkinson, GS Wilkinson, GS Wilkinson, GS Wilkinson, GS Wilkinson, GS Wilkinson, GS Wilkinson, HS Crudgington, J Small, JA Zeh, Kevin Fowler, KM Webberley, L Rowe, LS Corley, LW Simmons, LW Simmons, M Kotrba, M Olsson, M Ridley, MD Jennions, P Reguera, PD Lorch, PM Johns, Q Wang, R Thornhill, RH Baker, RH Baker, RK Butlin, S Cotton, Samuel Cotton, SN Gershman, T Chapman, T Madsen, T Tregenza, T Tregenza, T Tregenza, TF Wright, TM Ivy, Tom Pizzari, WG Eberhard   +58 more
core   +4 more sources

Effect analysis of improving human sperm quality by a novel distance-temperature-combined selection approach [PDF]

Jichu yixue yu linchuang, 2020
Objective To investigate the effect of improving human sperm quality by novel selection approach based on progressive motility and thermotaxis. Methods The capacitated spermatozoa were placed on one end of strip droplets with different length (2, 5, 8
RAO Jin-peng, QIU Feng, CAI Yi-ting, WEI Kai, JIN Min, JIN Fan
doaj  

Selection Bias in Occupational Sperm Studies [PDF]

American Journal of Epidemiology, 1998
Participation rates in sperm studies are typically 25-50%, and therefore it is a matter of concern whether the men who provide semen samples truly reflect the parent population. The authors analyzed data from three Danish occupational sperm studies and evaluated the relation between age and occurrence of subfertility to participation and provision of ...
S B, Larsen, A, Abell, J P, Bonde
openaire   +2 more sources