Results 81 to 90 of about 46,525 (280)
Detection of Estrus by Three Methods
Journal of Dairy Science, 1977 Estrus was detected by three methods in 88 postpartum Holstein cows housed in tie-stalls and allowed free activity 1 to 2 h daily in separate exercise lots. Cows in each of three groups were observed visually for standing estrus by herdsmen. Cows (31) in Group I were observed only visually and served as controls, cows (33) in Group II were fitted with ...
J S, Stevenson, J H, Britt
openaire +2 more sources
Journal of Applied Toxicology, EarlyView.ABSTRACT Bisphenol A (BPA) is a widely used industrial chemical found in polycarbonate plastics and epoxy resins and is recognized for its endocrine‐disrupting properties. Human exposure is common due to its presence in food packaging and everyday products. As BPA use has been restricted, structurally similar compounds such as BPS, BPB, BPAF, and BADGE
Nurbanu Zengin +4 more
wiley +1 more source
Ecosistemas y Recursos Agropecuarios, 2015 Both growth and milk production in heifer calves are stimulated by a long photoperiod, though this has not been proven yet in subtropical areas. To evaluate the effect of 16 hr of light (L16) on calves suckling (LAC) and/or pre-pubertal stages (PP) in a ...
Nicolás Valenzuela-Jiménez +5 more
doaj +1 more source
Estrus Detection in Mares [PDF]
, 2011 In a successful horse-breeding program, it is im¬portant to understand the reproductive cycles and be¬haviors of a mare. The reproductive cycle of a mare is called the estrous cycle and lasts an average of 21 days from one ovulation to the next.
Bott, Rebecca, Sandager, Brianna
core +1 more source
Journal of Applied Toxicology, EarlyView.ABSTRACT The extensive use of pesticides in modern agriculture has raised increasing concerns regarding the potential biological effects of repeated exposure to pesticide residues and commercial formulations. Mancozeb is a widely used ethylene‐bis‐dithiocarbamate fungicide; however, information on its hematological and genotoxic effects following ...
Matheus Henrique Barcelos Figueiredo +10 more
wiley +1 more source
, 2004 Experiment one examined effects of season, parity, genotype, lactation length, and weaning-to-estrus interval on the postweaning duration of estrus (DE) and onset of estrus-to- ovulation interval (EOI) of sows in three farms.
Belstra, Bradley Aaron
core
Design, development and optimisation of veterinary intravaginal controlled release drug delivery systems [PDF]
, 2014 This Thesis begins by discussing the application of controlled drug delivery to the intravaginal delivery of hormones to control the oestrous cycle of farmed animals, with particular emphasis on the delivery of progestagens to cattle and sheep.
Ogle, Colin Roger
core
Journal of Applied Toxicology, EarlyView.ABSTRACT Paracetamol is a widely used analgesic during pregnancy; however, emerging evidence suggests it may act as an endocrine/metabolism disrupting compound. Using an F1 female CD1 mouse model, this study scrutinized the long‐term metabolic and reproductive consequences linked to intrauterine paracetamol exposure.
Bita Entezari +7 more
wiley +1 more source
AnimalsProlactin (PRL) plays a key role in the growth and ovulation of animal follicles, but its impact on follicular recruitment in ewes remains uncertain. In this study, a total of sixteen healthy ewes (Hu sheep, aged 2–3 years, with continuous reproduction ...
Sicong Yue +8 more
doaj +1 more source
Journal of Dairy Science, 1998 The optimal time of artificial insemination (AI) was determined from data for 2661 AI in 17 herds utilizing a radiotelemetric system for estrus detection that has the potential for continuous 24-h surveillance to monitor behavioral events associated with estrus.
M B, Dransfield +3 more
openaire +2 more sources