Effect of heat stress on conceptus and uterine secretion in the bovine

Geisert, R. D.; Zavy, M. T.; Biggers, B. G.

doi:10.1016/s0093-691x(88)80031-1

Cited by 17 publications

(6 citation statements)

References 13 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…In this region, the last months of the year are characterized by a high humidity-temperature index (Rivera et al, 2001) and a low wind velocity, affecting the reproductive efficiency (Ingraham et al, 1974). It has been stated that environmental stress diminishes the conception rate in cattle (RomanPonce et al, 1977), influences the intensity and duration of oestrus (Gwazdauskas et al, 1981), modifies the endocrine balance (Roman-Ponce et al, 1981), alters the oviductal and uterine environment (Geisert et al, 1988;Malayer et al, 1988) and delays or interrupts early embryo development (Putney et al, 1989).…”

Section: Discussionmentioning

confidence: 99%

Factors Affecting Fertility According to the Postpartum Period in Crossbred Dual-Purpose Suckling Cows in the Tropics

Perea

Belloso

Stagnaro

et al. 2005

Trop Anim Health Prod

View full text Add to dashboard Cite

To determine the relationship between first service conception rate (FSC) and the postpartum period (PP), 6160 calvings from 2250 crossbred dual-purpose cows were analysed. The effects of breed predominance (BT: Bos taurus and BI: Bos indicus), season of service (dry, intermediate and humid), parity (1 or 2 and more), agroecological region (Sub-humid and Dry Tropical Forest) and milk production were studied. The postpartum period was grouped according to the calving-first service interval as G1 < or = 60 days (n = 1889); G2 > 60 < or = 90 days (n = 1436); G3 > 90 < or = 120 days (n = 1030); and G4 > 120 days (n = 1805). Data were analysed by chi-squared test. The overall mean for FSC was 58.2% and was lower in G1 (p < 0.01). All PP showed a breed effect on FSC, with mean values of 61.6% and 53.3% for BI and BT, respectively. Season of service also affected FSC, which was significantly lower during the humid period: 51.2% versus 57.4% and 61.5% for the intermediate and dry periods (p < 0.01), respectively. Parity and environmental effects were not observed on FSC. Levels of milk yield did influence the FSC, which decreased from 66.7% and 61.0% for milk yields of < 1500 kg and between 1501 and 2000 kg to 46.0% in milk yields > 2000 kg (p < 0.01).

show abstract

Section: Discussionmentioning

confidence: 99%

Factors Affecting Fertility According to the Postpartum Period in Crossbred Dual-Purpose Suckling Cows in the Tropics

Perea

Belloso

Stagnaro

et al. 2005

Trop Anim Health Prod

View full text Add to dashboard Cite

show abstract

“…Interestingly, although increased humidity during this period altered metabolic and respiratory traits, it had no effect on conceptus mass or pregnancy rates. Conceptuses recovered from cows subjected to such treatments secreted more of the luteotrophic factor interferon (IFN)t in vitro than conceptuses from cows housed at 218C (Geisert et al 1998).…”

Section: Changes To the Maternal Environment Affect The Earliest Stagmentioning

confidence: 99%

Nutritional effects on oocyte and embryo development in mammals: implications for reproductive efficiency and environmental sustainability

Ashworth

Toma²,

Hunter

2009

Phil. Trans. R. Soc. B

174

114

View full text Add to dashboard Cite

The environment in which a breeding female lives prior to conception and during the early stages of her pregnancy has striking effects on oocytes developing in the ovarian follicle and on early embryos in the reproductive tract. Of the various environmental factors known to affect oocyte and embryo development, altered nutrition during this critical period has been particularly well studied. Alterations in the quantity of food consumed or the composition of the diet imposed solely during the pre-mating period affect oocyte maturity, blastocyst yield, prenatal survival and the number of offspring born alive. Importantly, nutrition at this time also affects the quality of embryos and resultant offspring, with increasing evidence from a variety of species showing that periconception nutrition can alter behaviour, cardiovascular function and reproductive function throughout post-natal life. In livestock species, it is important to devise nutritional strategies that improve reproductive efficiency and the quality of offspring but that do not add to the environmental footprint of the production system and which recognize likely changes in feedstuff availability arising from predicted changes in climate.

show abstract

“…In dairy cattle, short term heat stress at the time of breeding or within the 1 st week after breeding appears to be the most deleterious time for due to elevated temperatures, asa results of in delayed embryonic development that eventually becomes "out of sync" with its maternal environment. The previous results may explained by the finding of Biggers et al (1987) and Geisert et al (1988) who reported that the cowsexposed to heat stress from day 8 to 16 after breeding had decreased progesterone concentration and increased uterine prostaglandin secretion.…”

Section: Seasonsmentioning

confidence: 92%

Actors Associated With Pregnancy Losses in Friesian Cows Raised Under Egyptian Conditions

2016

Journal of Sustainable Agricultural Sciences

View full text Add to dashboard Cite

A total of 1,486 records for dairy Friesian cows from 2007-2015 were analyzed to investigation the factors associated with pregnancy losses or abortion raised under Egyptian conditions. The overall incidence of pregnancy losses was 9.89% in this study. The results showed that the cow age at the conceived insemination in Friesian cows having ≤16 and ≥ 96.1 months of age was significantly (P<0.01) associated with high incidence of pregnancy losses compared with that having 16.1 to 96 months. Also, extreme body weight at the conceived service was related to pregnancy losses, cows having ≤400 and ≥600 kg of live body weight showed higher percent (P<0.01) of pregnancy losses (13.51 and 20.59%) compared to7.94 and 8.69% in cows weighted 401 to 499 and 500 to 599 kg respectively. The cow's parity was significantly (P<0.01) associated with incidence of pregnancy losses, cows had 4 th , 5 th and ≥6 parities were higher than that of 1 st , 2 nd and 3 rd parities. Summer season recorded highest incidence of pregnancy losses compared to the other seasons. In addition, pregnancy losses was higher (P<0.01) in cows had high milk yield (≥20 kg daily milk daily) than cows inlow and moderate milk yield (≤6 to 15~20 kg daily milk daily) respectively. Nutrition system-1 showed significantly higher (P<0.01) association with the incidence of pregnancy loss compared to nutrition system-2. Either somatic cell count (SCC) or mastitis infection at insemination in Friesian cows were significantly (P<0.01) high associated with incidence of pregnancy losses in cows having >400,000 SCC\ml of milk than that having ≤ 200 and ≤ 400000 SCC\ml of milk.

show abstract

Effect of heat stress on conceptus and uterine secretion in the bovine

Cited by 17 publications

References 13 publications

Factors Affecting Fertility According to the Postpartum Period in Crossbred Dual-Purpose Suckling Cows in the Tropics

Factors Affecting Fertility According to the Postpartum Period in Crossbred Dual-Purpose Suckling Cows in the Tropics

Nutritional effects on oocyte and embryo development in mammals: implications for reproductive efficiency and environmental sustainability

Actors Associated With Pregnancy Losses in Friesian Cows Raised Under Egyptian Conditions

Contact Info

Product

Resources

About