A GROUP of dairymen in New Jersey organized in 1938 the first cooperative in the United States for the artificial insemination of their cows. This method of serving females without natural mating has since become one of the most significant programs for livestock improvement in the history of American agriculture. A great deal of research has been done on all phases. A basic contribution was th...

Farrowing rate and number of pigs born alive were compared after use of either frozen semen or combined fresh and frozen semen matings in nulliparous gilts. Estrus was synchronized using Altrenogest (AT: Regu-Mate® Solution, Hoescht Roussel Vet, Warren, New Jersey) and detected with a mature boar. The farrowing rate was 74% for females inseminated with frozen semen, and 88% for females insemina...

PURPOSE This study was conducted to find the relative risk of semen abnormality with respect to smoking history and obesity. MATERIALS AND METHODS Subfertile or infertile men were enrolled in this study from July 2010 to June 2011. All participants provided their cigarette use information, self-reported weight, height, semen analysis, physical examination, and sexually transmitted disease sta...

BACKGROUND Population-based study of semen quality is rare in literature. METHODS Healthy men aged 20-60 years from six Chinese provinces were invited to participate in the study between December 2000 and November 2002. Posters were distributed in the participating counties to enroll 200 subjects from each province. Medians, percentiles, and proportions below lower threshold of the WHO criter...

The aim of this study was to determine the influence of time interval between semen collection and artificial insemination (AI) and the number of spermatozoa in AI doses, on the AI success rate in Tunisian Arabian mares. A total of 79 AI with fresh semen was used on 56 mares (age 4-9 years, n = 34; age 10-20 years, n = 22). The AI success rate was defined as the number of pregnant mares divided...

Storage of ram semen in liquid and frozen state, the diluents used for both methods, processing, cooling, freezing and thawing of semen are reviewed. Factors influencing the fertility of stored semen and methods used for improvement are discussed, and fertility results of long-term frozen stored ram semen are also given.

Objective To prospectively monitor Zika viral loads in semen from Belgian travellers with confirmed Zika virus infection, who returned from the Americas during the 2016 Zika virus epidemic. Methods We recruited symptomatic travellers consulting our clinic and we confirmed infection with either reverse-transcriptase (RT) polymerase chain reaction (PCR) assay or virus neutralization test. The p...

Some persistent organic pollutants (POPs) have been found in human semen but until this point it was unclear whether polybrominated diphenyl ethers (PBDEs) could be detected in human semen. In this study, PBDEs were found for the first time in human semen samples (n=101) from Taizhou, China. The concentrations of total PBDEs (∑PBDEs) varied from 15.8 to 86.8 pg/g ww (median=31.3 pg/g ww) and 53...

The mobility of pooled turkey sperm following various storage regimens was assessed by objectively measuring the ability of sperm to penetrate a 2% Accudenz [5-(N-2,3-dihydroxypropylacetamido)-2,4,6-tri-iodo-N,N'-bis(2,3-dihydroxypropyl)isophthalamide] solution at 41 C. When semen was diluted with Beltsville poultry semen extender and stored at 5 C with agitation at 150 rpm, sperm mobility decl...

effect of propylthiouracil (ptu)-induced hypothyroidism during the prepubertal period, at a dose of oneg per kg of the diet, on serum testosterone level and seminal characteristics of fars indigenous chickens wasstudied. ptu was fed between 7th to 13th weeks of age and semen was collected at weekly intervals, starting at 21st week of age and continued for seven weeks. the effect of ptu treatmen...