Influence of maternal nutrition and heat stress on bovine oocyte and embryo development

Abstract

The global population is expected to increase from 7.6 to 9.6 billion people from 2017 to 2050. Increased demand for livestock production and rising global temperatures have made heat stress (HS) a major challenge for the dairy industry. HS been shown to have negative effects on production parameters such as dry matter intake, milk yield, and feed efficiency. In addition to affecting production parameters, HS has also been shown to have negative effects on the reproductive functions of dairy cows. Mitigation of HS effects on dairy cow productivity and fertility necessitate the strategic planning of nutrition, and environmental conditions. The current review will discuss the potential nutriepigenomic strategies to mitigate the effect of HS on bovine embryo.

Health status of gene fond donor cows of Latvian native breeds Latvian brown and Latvian blue

“…There are many important factors to be considered for successful MOET in a cow (Mikkola, 2017;Marie, 1999). A good herd and individual cow reproductive health (Kohrama & Poorhamdollaha, 2012), appropriate metabolic status (Gabriel & Reuben, 2014), age, successful parturition, optimal indices of artificial insemination (AI) in a herd and individual cow, welfare and housing conditions (Abdelattya et al, 2018), kind of protocol (Barusellia et al, 2011) and medicines to induce MO (Mikkola & Taponen, 2017), embryo flushing method, staff qualification and experience -these and many other common and individual factors are important for successful MOET.…”

Effect of the Strategic Supplementation for Producing Embryos of Native Hartón del Valle Heifers

“…Furthermore, fluid composition influenced on oocyte quality. Several studies agree that factors associated with good embryonic quality require simple carbohydrates, pyruvate, ATP, microminerals, antioxidants and vitamins (López-Velázquez et al, 2019;Cajas et al, 2019;Torres Osorio et al, 2019;Abdelatty et al, 2018;Agarwal et al, 2018).…”

Heat stress on cattle embryo: gene regulation and adaptation

“…Heat stress has been shown short and long term negative effects on reproduction in cattle ( Wolfenson et al., 1997 ), including decreased fertility ( Khan et al., 2020 ; Wolfenson and Roth, 2019 ; Mellado et al., 2013 ; Hansen, 2019 ), reduction in the follicular growth ( de et al., 2008 ), postpartum anoestrus ( Benyei et al., 2001 ), oocyte quality ( Abdelatty et al., 2018 ; Paula-Lopes and Hansen, 2002 ; Rispoli et al., 2011 ), implantation and viability of blastocyst ( Burkuš et al., 2015 ; Vasconcelos et al., 2006 ) and fetal development ( Koch et al., 2016 ).…”

“…Heat stress can also impair the production of the hormones that regulate ovarian function such as GnRH, LH, and FSH, leading to poor follicle maturation ( Abdelatty et al., 2018 ; Khodaei et al., 2011 ). Impaired ovarian function determines a reduction in the number of ovulations and the number of viable embryos measured in the embryo recovery rate, pregnancy, and conception rate ( Benyei et al., 2001 ).…”