Prenatal transportation stress did not impact ovarian follicle count for three generations of female Brahman offspring.

Autor: Quail LK; Texas A&M AgriLife Research, Overton, TX 75684, United States; Texas A&M University, College Station, TX 77843, United States., Randel RD; Texas A&M AgriLife Research, Overton, TX 75684, United States., Welsh TH Jr; Texas A&M University, College Station, TX 77843, United States., Cushman RA; USDA-ARS, Meat Animal Research Center, Clay Center, NE 68933, United States., Yake HK; USDA-ARS, Meat Animal Research Center, Clay Center, NE 68933, United States., Branco RADO; Texas A&M AgriLife Research, Overton, TX 75684, United States., Neuendorff DA; Texas A&M AgriLife Research, Overton, TX 75684, United States., Long CR; Texas A&M AgriLife Research, Overton, TX 75684, United States., Perry GA; Texas A&M AgriLife Research, Overton, TX 75684, United States. Electronic address: george.perry@ag.tamu.edu.
Jazyk: angličtina
Zdroj: Animal reproduction science [Anim Reprod Sci] 2022 Aug; Vol. 243, pp. 107016. Date of Electronic Publication: 2022 Jun 08.
DOI: 10.1016/j.anireprosci.2022.107016
Abstrakt: As prenatal transportation stress altered behavior and adrenal glucocorticoid secretion of calves, we hypothesized that prenatal transportation stress would decrease ovarian reserve size and negatively impact female offspring fertility. The impact of prenatal transportation stress on ovarian follicle numbers in female offspring for three generations was studied. Brahman cows were transported for 2 h on day 60 ± 5, 80 ± 5, 100 ± 5, 120 ± 5, and 140 ± 5 of gestation. Ovaries were collected from offspring of transported or non-transported dams at multiple ages. Primordial, primary, secondary, and antral follicles were histologically analyzed. Antral follicle numbers were determined by ultrasound in a subset of offspring. Numbers of primordial, primary, secondary, and antral follicles were analyzed using the MIXED procedure, while the CORR procedure of SAS was used to determine the correlation between follicles observed by ultrasonography and histology. There were no differences (P > 0.05) in the number of primordial, primary, secondary, antral, or total follicles observed histologically due to treatment. Younger females had significantly greater numbers of follicles than older females (P < 0.0001). Antral follicles tended to be correlated with total histological ovarian follicles (P = 0.10). There was no difference in the number of antral follicles observed at ultrasound due to treatment (P = 0.3147), or generation (P = 0.6005) when controlling for age at observation. These results show that short-term transportation stress during early- to mid-gestation did not impact fertility as measured by ovarian follicle numbers in female Brahman offspring for three generations.
(Copyright © 2022 Elsevier B.V. All rights reserved.)
Databáze: MEDLINE
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