Now showing items 21-30 of 621
Zona pellucida induced acrosome reaction, sperm morphology, and sperm-zona binding assessments among subfertile men
Purpose: The study aimed to evaluate the relationship between the zona pellucida induced acrosome reaction (ZIAR) and (i) percentage normal spermatozoa as well as (ii) sperm-zona pellucida binding potential among men ...
Dynamics of respiratory gas exchange during exercise after correction of congenital heart disease
In pediatric exercise testing, conventional measures of aerobic exercise function such as maximal O2 uptake or the ventilatory anaerobic threshold (VAT) use only one value for the assessment of exercise capacity. We studied ...
Relationship between Human Sperm Morphology and Acrosomal Function
Purpose: In this study, we investigated the relationship between functionality of the acrosome and sperm morphology. Methods: Acrosome reaction (AR) was separately determined in live and dead sperm and in those with normal, ...
The gubernaculum during testicular descent in the human fetus
This study of 178 male human fetuses and infants demonstrates that descent of the testis through the inguinal canal is a rapid process, with 75% of testes descending between 24 and 28 weeks of gestation. The gubernaculum ...
Use of failed-fertilized oocytes for diagnostic zona binding purposes after sperm binding improvement with a modified medium
Purpose: Because the availability of prophase oocytes for zona binding testing is limited, we compared sperm binding to the zona of failed- fertilized intracytoplasmic sperm injection (ICSI) and in vitro fertilization (IVF) ...
Defining bioassay conditions to evaluate sperm/zona interaction: Inhibition of zona binding mediated by solubilized human zona pellucida
Objective: Our goal was to study the influence of solubilized human zonae pellucidae on zona binding potential and acrosome reaction. Materials and Methods: Zona pellucida (ZP) solutions were prepared by dissolving zona ...
Physiological induction of the acrosome reaction in human sperm: Validation of a microassay using minimal volumes of solubilized, homologous zona pellucida
Purpose: To develop a method that could accommodate microvolumes of solubilized human zona pellucida (ZP) and sperm for assessing the induction of the acrosome reaction. Methods: A microassay using 1 μl of 2.5, 1.25, 0.6, ...
Seasonal changes in human sperm chromatin condensation
Purpose: The aim of this study was to investigate possible seasonal changes in human sperm parameters, especially chromatin condensation. Method: In a first run, 3155 patients attending the andrological outpatient clinic ...
An intracytoplasmic sperm injection pregnancy with a globozoospermic male
[No abstract available]
Recombinant human bone morphogenetic protein-2 for treatment of open tibial fractures a prospective, controlled, randomized study of four hundred and fifty patients
Background: The treatment of open fractures of the tibial shaft is often complicated by delayed union and non-union. The objective of this study was to evaluate the safety and efficacy of the use of recombinant human bone ...