achalasia is a primary motor disorder of the esophagus, in which esophageal emptying is impaired. diagnosis of achalasia is based on clinical findings and confirmed by radiologic, endoscopic and manometric evaluations. several treatments for achalasia have been introduced. we searched the pubmed database for original articles and meta-analyses about achalasia to summarize the current knowledge ...

the swim-up procedure was used to collect a sperm fraction with improved motility and normal morphology from fertile and infertile semen samples. the untreated and swim-up fractions were analyzed with the hamilton-thorn motility analyser. comparisons were made to see the effect of this sperm selection technique on sperm motility and morphology. they were then examined by transmission electron m...

OBJECTIVE In assisted reproduction, spermatozoa must be effectively separated from seminal plasma to undergo capacitation, a prerequisite for fertilization. Percoll was recently withdrawn from the American market because of safety concerns. The purpose of this study was to evaluate the quality of sperm separated by two different sperm washing media, and compare these results to sperm quality af...

The aim of the study was to evaluate motility parameters of Lacaune (Lc) and east-Friesian (eF) ram frozen-thawed spermatozoa by cASA (computer-Automated Sperm Analysis) technique in relation to their in vivo fertilizing ability. Fresh ejaculates were diluted in a Triladyl extender containing 20 % egg yolk, 6 % glycerol and 0.1 % trehalose and frozen in a liquid nitrogen vapour. The evaluation ...

In this study, the formation of hydrogen peroxide (H2O2) by chilled goat spermatozoa was measured. Furthermore, the effects of dead spermatozoa on motility characteristics were studied. Fresh collected ejaculates from five Shami bucks were centrifuged and virtually all seminal plasma was removed. A part of the collected spermatozoa was killed by two ways: the first by repe...

Chicken seminal plasma contains a high content of sex steroids including progesterone (P4). According to a published study, in vitro supplementation of P4 to the semen resulted in decreased fertility in the White Leghorn chicken; however, it is not known if increased P4 production in vivo is associated with decreased sperm fertility. Therefore, the aim of the present experiment was to study the...