High numbers of antral follicles are positively associated with in vitro embryo production but not the conception rate for FTAI in Nelore cattle

Santos, Gustavo Martins Gomes dos; Silva-Santos, Kátia Cristina; Barreiros, Thales Ricardo Rigo; Morotti, Fábio; Sanches, B. V.; Moraes, Fábio Lucas Zito de; Blaschi, Wanessa; Seneda, Marcelo Marcondes

doi:10.1016/j.anireprosci.2015.11.024

Cited by 60 publications

(57 citation statements)

References 21 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Several studies with indicus showed the same pattern of that obtained from taurus donors. For example, Nelore cows (n = 66) classified into high (>40 follicles), intermediate (18 to 25 follicles) or low AFC (<7 follicles) groups produced 42, 32 and 13% (P < 0.05) of total blastocyst rates, respectively (Santos et al, 2016). Considering indicustaurus heifers classified in high (≥40 follicles) or low (≤10 follicles) AFC groups, the results showed a greater number of embryos produced in females with high AFC compared with those with low AFC (6.9 ± 5.3 vs. 1.9 ± 2.1; Silva- Santos et al, 2014a).…”

Section: Antral Follicle Count and Efficiency In Embryo Productionmentioning

confidence: 99%

“…Many advantageous features that affect fertility have been related to the number of follicles in the ovary (Ireland et al, 2008), such as plasma progesterone concentration, (Jimenez-Krassel et al, 2009;Martinez et al, 2016), shorter interval between calvings (Mossa et al, 2012), and CL function and endometrial thickness (JimenezKrassel et al, 2009). However, it is important to emphasize that the positive correlation between AFC and cow fertility was mainly described in Bos taurus cattle (Mossa et al, 2012(Mossa et al, , 2013Walsh et al, 2014;Jimenez-Krassel et al, 2015;McNeel and Cushman, 2015;Santos et al, 2016).…”

Section: Fertility Parameters and Afc In Cowsmentioning

confidence: 99%

“…On the other hand, for Zebu females, the relationship between AFC and pregnancy per AI remains equivocal. In fact, several studies have shown improved proportion of pregnancy in cows with low or intermediate AFC (Jimenez-Krassel et al, 2017;Santos et al, 2013Santos et al, , 2016.…”

Section: Challenges Related To Afcmentioning

confidence: 99%

“…Additionally, the number of oocytes and blastocysts (Guerreiro et al, 2014), as well as the concentration of progesterone, were greater for cows with more antral follicles (Jimenez-Krassel et al, 2009). Moreover, females with high AFC showed a greater number of embryos produced by the donors in Bos taurus (Ireland et al, 2008), crossbred indicus-taurus (Silva- Santos et al, 2014a) and Bos indicus (Santos et al, 2016). Additionally, cows with high AFC presented greater pregnancy rates compared with those with low AFC (Evans et al, 2012;Mossa et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Antral follicle count in cattle: advantages, challenges, and controversy

Morotti¹,

Zangirólamo²,

Silva³

et al. 2017

Anim Reprod

View full text Add to dashboard Cite

The antral follicle count (AFC) represents the number of follicles visualized by ultrasonography in the ovaries. Antral follicle count tends to be variable among cows but with high repeatability within the same individual. In the last decade, AFC has been considered a biological marker of fertility with many positive aspects of reproductive efficiency for those animals with high AFC. For instance, a larger number and better-quality embryos, better pregnancy rates, increased concentrations of circulating progesterone, in addition to other characteristics linked to fertility, are all responses observed in individuals with high compared with those with low AFC in Bos taurus cattle. However, the positive association between AFC and fertility did not follow the same pattern for Bos indicus. Recent articles showed no connection between fertility and number of antral follicles or better reproductive efficiency for high AFC group in Zebu cows. Thus, the aim of this review is to discuss the various data concerning AFC between indicus and taurus cattle. Additionally, we consider AFC to be a possible tool to improve cattle performance in reproductive biotechnology.

show abstract

Section: Antral Follicle Count and Efficiency In Embryo Productionmentioning

confidence: 99%

Section: Fertility Parameters and Afc In Cowsmentioning

confidence: 99%

Section: Challenges Related To Afcmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Antral follicle count in cattle: advantages, challenges, and controversy

Morotti¹,

Zangirólamo²,

Silva³

et al. 2017

Anim Reprod

View full text Add to dashboard Cite

show abstract

“…However, recent studies have revealed different patterns in Zebu cattle. When comparing pregnancy rates after artificial insemination, Bos taurus indicus cows with low AFCs presented better results, while females with high AFCs showed lower pregnancy rates (Santos et al, 2012(Santos et al, , 2013Morotti et al, 2014;Santos et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

Cell proliferation in ovarian follicles from Bos taurus indicus females with different antral follicle count

Machado¹,

Bergamo²,

Bizarro-Silva³

et al. 2017

Anim Reprod

Self Cite

View full text Add to dashboard Cite

The aim of this study was to compare the cell proliferation rate of follicles from Bos taurus indicus females with different antral follicle counts (AFCs). Thirty pairs of ovaries were classified as having low (≤ 31 follicles), intermediate (≥ 46 and ≤ 76 follicles) or high AFC (≥ 9 1 follicles). The ovaries were cut into 1 x 1 x 0.3 cm fragments, fixed in 10% buffered formalin solution and subjected to immunohistochemical analysis for proliferating cell nuclear antigen (PCNA). PCNA detection was detected in all stages of follicular development, being 1,388 (82.23%) primordial, 197 (11.67%) primary, 29 (1.72%) secondary and 74 (4.83%) antral follicles. The PCNA detection rate was higher (P ≤ 0.05) for antral and secondary follicles in ovaries with intermediate and low AFCs. This study showed that higher PCNA at early stages of follicular growth is detected in animals with high AFC, whereas a higher PCNA is seen in secondary and antral follicles of animals with low AFC.

show abstract