Results 21 to 30 of about 1,670,435 (349)

Testicular histopathological diagnosis as a predictive factor for retrieving spermatozoa for ICSI in non-obstructive azoospermic patients

open access: yesInternational Brazilian Journal of Urology, 2005
OBJECTIVE: Histological testicular pattern has a predictive role in the possibility of finding spermatozoa for ICSI in cases of non-obstructive azoospermia because some individuals could show residual spermatogenic sites in the testis.
Sidney Glina   +5 more
doaj   +1 more source

Phospholipase C Zeta 1 (PLCZ1): The Function and Potential for Fertility Assessment and In Vitro Embryo Production in Cattle and Horses

open access: yesVeterinary Sciences, 2023
Phospholipase C Zeta 1 (PLCZ1) is considered a major sperm-borne oocyte activation factor. After gamete fusion, PLCZ1 triggers calcium oscillations in the oocyte, resulting in oocyte activation.
Raul A. Gonzalez-Castro   +1 more
doaj   +1 more source

THE ECOLOGY OF FERTILIZATION OF ECHINOID EGGS: THE CONSEQUENCES OF SPERM DILUTION, ADULT AGGREGATION, AND SYNCHRONOUS SPAWNING.

open access: yesThe Biological Bulletin, 1985
Percent fertilization of eggs of the echinoid Strongylocentrotus droebachiensis (O. F. Müller) was determined both in laboratory and field experiments.
J. Pennington
semanticscholar   +1 more source

The Efficiency of Introducing Intrauterine Infusion of Autologous Platelet-Rich Plasma versus Granulocyte Colony-Stimulating Factor in Repeated Implantation Failure Patients: An Unblinded Randomised Clinical Trial [PDF]

open access: yesInternational Journal of Fertility and Sterility
Background: Repeated implantation failure (RIF) refers to the condition where high quality embryos are unable tosuccessfully implant after multiple cycles of in vitro fertilization (IVF) treatment.
Marzieh Mehrafza   +9 more
doaj   +1 more source

Laparoscopy‐assisted vasovasostomy for post‐herniorrhaphy vas deferens obstruction

open access: yesIJU Case Reports, 2020
Introduction Repair of obstructive azoospermia caused by childhood herniorrhaphy may be difficult. Therefore, intracytoplasmic sperm injection using testicular sperm is performed.
Masahiro Uchida   +7 more
doaj   +1 more source

Polyandrous females avoid costs of inbreeding [PDF]

open access: yes, 2002
Why do females typically mate with more than one male? Female mating patterns have broad implications for sexual selection, speciation and conflicts of interest between the sexes, and yet they are poorly understood. Matings inevitably have costs, and for
A Keil   +31 more
core   +1 more source

Intracytoplasmic Sperm Injection in Cattle [PDF]

open access: yesGenes, 2021
Intracytoplasmic sperm injection (ICSI) involves the microinjection of sperm into a matured oocyte. Although this reproductive technology is successfully used in humans and many animal species, the efficiency of this procedure is low in the bovine species mainly due to failed oocyte activation following sperm microinjection.
Veena Unnikrishnan   +2 more
openaire   +2 more sources

Effects of Thymoquinone on Sperm Parameters, Apoptosis, Testosterone Level, and Oxidative Stress in a Mouse Model of D-Galactose-Induced Aging [PDF]

open access: yesPharmaceutical Sciences, 2018
Background: The aging process is accompanied by low secretion of sex hormones and testicular apoptosis. The antioxidant properties of thymoquinone (TQ) may prevent the effects of aging.
Seyedeh Saleheh Attari   +5 more
doaj   +1 more source

NUCB2/nesfatin-1 suppresses the acrosome reaction in sperm within the mouse epididymis

open access: yesAnimal Cells and Systems, 2023
Nesfatin-1, a polypeptide hormone derived from the nucleobindin 2 (NUCB2) precursor protein, is known to regulate appetite and energy metabolism. Recent studies have also shown that NUCB2/nesfatin-1 is expressed in the reproductive organs of mice ...
Soohyun Kim   +5 more
doaj   +1 more source

Immunohistochemical detection of macrophage migration inhibitory factor in fetal and adult bovine epididymis: Release by the apocrine secretion mode? [PDF]

open access: yes, 2006
Originally defined as a lymphokine inhibiting the random migration of macrophages, the macrophage migration inhibitory factor (MIF) is an important mediator of the host response to infection.
Agarwal A.   +57 more
core   +1 more source

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