The detrimental effects of heat stress on fertility in cattle are less pronounced in heat-tolerant
breeds. Although these genetic differences reflect differences in thermoregulation, cells from …

Much of the effect of heat stress on establishment and maintenance of pregnancy involves
changes in ovarian function and embryonic development that reduce the competence of the …

High environmental temperatures during the hot months of the year reduce reproductive
performance in cattle. Summer heat stress depression in fertility is a multifactorial problem; …

During their separate evolution from Bos taurus, zebu cattle (Bos indicus) have acquired
genes that confer thermotolerance at the physiological and cellular levels. Cattle from zebu …

Exposure to 41° C reduces development of embryos of heat-sensitive breeds (Holstein and
Angus) more than for embryos of the heat-tolerant Brahman breed. Here it was tested …

Brahman preimplantation embryos are less affected by exposure to heat shock than Holstein
embryos. Two experiments were conducted to test whether the ability of Brahman embryos …

Heat stress can reduce fertility in cattle (Dutt, 1963; Dunlap and Vincent, 1971; Turner, 1982;
Ealy et al., 1993; Ryan et al., 1993) and other species (Shah, 1956; Alliston and Ulberg …

The goal was to understand the role of heat shock at the zygote stage in causing infertility.
Culture at 40° C reduced the percentage of inseminated oocytes that became a morula or …

Global warming has been affecting animal husbandry and farming production worldwide via
changes in organisms and their habitats. In the tropics, these conditions are adverse for …

Heat stress causes large reductions in fertility in lactating dairy cows. The magnitude and
geographical extent of this problem is increasing because improvements in milk yield have …