Results 81 to 90 of about 651,503 (286)
International Journal of Reproductive BioMedicine, 2018 Background: Sperm morphology has been strongly linked to fertilization. This makes it an important component in semen analysis. They are usually assessed by world health organization (WHO) standard or Kruger strict criteria in in-vitro fertilization (IVF)
Faduola Paul +2 more
doaj
Semen Characteristics of Local Breeder Cocks in the Sahel Region of Nigeria
Revue d’Elevage et de Médecine Vétérinaire des Pays Tropicaux, 2001 Semen characteristics of local cocks (60.9 ± 10.6 weeks old) in the Sahel region of Nigeria were recorded from May to September 1998. Mean values (± SD) were: semen volume 0.28 ± 0.14 ml, sperm concentration 2.26 ± 1.08 x 109 sperm/ml, total sperm count ...
G. S. Bah +2 more
doaj +1 more source
BMJ, 1996 The controversy over whether sperm counts have declined over the past 50 years is reopened by two papers in this issue of the BMJ. In a carefully analysed study of cohorts of unselected men in Britain born between 1951 and 1973, Irvine and colleagues demonstrate a progressive decline in sperm concentration and total sperm number per ejaculate of about ...
openaire +1 more source
The legacy of sperm banking: how fertility monitoring and disposal of sperm are linked with views of cancer treatment [PDF]
, 2011 Background: sperm banking is recommended for all men before cancer treatment, which carries a risk of long-term gonadal damage. However, relatively few men take up the offer.
Arden-Close, Emily +9 more
core +1 more source
Animal Models and Experimental Medicine, EarlyView.D‐limonene supplementation enhances testicular recovery following orchiopexy in a rat model of bilateral cryptorchidism. Treatment with D‐limonene reduces oxidative stress (↓MDA, ↑SOD, ↑GPx, ↑TAC), downregulates pro‐apoptotic proteins (↓TNF‐α, ↓BAX, ↓Caspase‐3), and upregulates anti‐apoptotic Bcl‐2 expression.
Arman Norouzi‐Ghalehbala +6 more
wiley +1 more source
Pitfalls in experiments testing predictions from sperm competition theory [PDF]
, 2005 Engqvist L, Reinhold K. Pitfalls in experiments testing predictions from sperm competition theory. Journal of Evolutionary Biology. 2005;18(1):116-123.As females of many species mate with more than one male, ejaculates often face competition from the ...
Reinhold, Klaus +3 more
core +1 more source
A rhesus macaque model of α‐dystroglycanopathy caused by a POMT1 splice altering variant
Animal Models and Experimental Medicine, EarlyView.Rhesus macaques homozygous for a naturally occurring spice altering variant in the POMT1 gene develop lissencephaly, microphthalmia, and muscular contracture. The presentation models severe presentation of the human Walker‐Warburg syndrome. Abstract Background Biallelic mutations in genes associated with α‐dystroglycan glycosylation manifest in a ...
Anya Nordlund +7 more
wiley +1 more source
Protective Effect of All-Trans Retinoic Acid in Cisplatin-Induced Testicular Damage in Rats
The World Journal of Men's Health, 2019 Purpose: To investigate the effects of all-trans retinoic acid (ATRA) in cisplatin (CP)-induced testicular damage in rats. Materials and Methods: Twenty-eight male Wistar rats were divided into four groups: Control, ATRA alone, ATRA+CP, and CP alone ...
Cem Yucel +10 more
doaj +1 more source
Early stages of tooth development in the harbor porpoise Phocoena phocoena
The Anatomical Record, EarlyView.Abstract Here we describe the stages of tooth development in toothed whales on the basis of the harbor porpoise (Phocoena phocoena). The aim of the study was to find out whether these stages are identical to those of other mammals analyzed so far although toothed whales are homodont and monophyodont.
Lasse M. Mathes +2 more
wiley +1 more source
Tracing the evolutionary history of the morpho‐anatomy of baculum in primates
The Anatomical Record, EarlyView.Abstract Animal morphology reflects both evolutionary history and present‐day adaptation. Male mammal copulatory structures such as the baculum (penile bone) are ideal for studying these processes because of their complexity and high interspecific variability. In primates, however, research has focused mostly on baculum length.
Federica Spani +3 more
wiley +1 more source