1
|
U-krit W, Wadsungnoen S, Yama P, Jitjumnong J, Sangkate M, Promsao N, Montha N, Sudwan P, Mektrirat R, Panatuk J, Inyawilert W, Intawicha P, Tang PC, Moonmanee T. Understanding the Ovarian Interrelationship with Low Antral Follicle Counts (AFC) in the In Vivo Bos indicus Cow Model: Unilateral and Bilateral Main AFC as Possible Biomarkers of Ovarian Response to Hormonal Synchronisation. BIOLOGY 2022; 11:biology11040523. [PMID: 35453722 PMCID: PMC9029639 DOI: 10.3390/biology11040523] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/08/2022] [Revised: 03/06/2022] [Accepted: 03/25/2022] [Indexed: 12/05/2022]
Abstract
The antral follicle count (AFC) is a test in which the number of oocyte-containing follicles that are developing in both ovaries are visually counted. The count of these follicles strongly relates to the population of the growing follicle reserve on the ovaries. However, the importance of the main number of antral follicle populations (mAFC) in mono-ovulatory animal species has yet to be completely elucidated. Moreover, the investigation of the ovarian interrelationship with unilateral mAFC (main number of antral follicle populations appearing on only one side of the ovary) and bilateral mAFC (main number of antral follicle populations appearing in equivalent numbers on both sides of the ovary) and how understanding this interrelationship can offer possible indicators of ovarian response to hormonal induction have not yet been investigated in mono-ovulatory Bos indicus beef cows. The aim of this study is to investigate the different ovarian interrelationships of mAFC (unilateral and bilateral mAFC) at the time of exogenous hormonal stimulation on the total number of AFC (left and right ovaries) at the beginning of the hormonal protocol for ovarian stimulation and ovarian response at the completion of exogenous hormonal stimulation as well as their usefulness as possible biomarkers of successful hormonal stimulation in Bos indicus beef cattle. Beef cows (n = 104) with low total numbers of AFC (4.7 ± 2.4 follicles) were stimulated with a gonadotropin-releasing hormone-progesterone-prostaglandin F2α-based protocol. At the beginning of the hormonal protocol, ovarian ultrasound scans were performed to evaluate AFC from both ovaries of cows. Beef cows were divided into two groups, unilateral (n = 74) and bilateral mAFC (n = 30), according to the ovarian interrelationship. At the completion of the hormonal stimulation, ovarian ultrasound scans were performed to evaluate the dominant follicle (DF) and cows with DF > 8.5 mm in diameter emerging on their ovaries were defined as having experienced a response to hormonal stimuli. There was a difference of 19.1% between Bos indicus cows bearing unilateral mAFC that produced an increase in ovarian response (odds ratio = 2.717, p < 0.05) compared to the responsive rate of cows displaying bilateral mAFC (82.4% vs. 63.3%). In unilateral mAFC, cows bearing mAFC ipsilateral to the ovary of dominant follicle (DF) had a higher responsive rate than cows bearing mAFC contralateral to the DF ovary (50.0% vs. 32.4%, p < 0.05). In mAFC ipsilateral to the DF ovary, pregnancy rates were greatest in cows bearing mAFC and DF on the right ovary compared with cows bearing mAFC and DF on the left ovary (25.0% vs. 9.1%, p < 0.05). In primiparous and multiparous cows, unilateral mAFC occurs with a greater (p < 0.05) frequency than bilateral mAFC (69.0% and 72.0% vs. 31.0% and 28.0%, respectively). In unilateral mAFC, primiparous cows bearing mAFC ipsilateral to the DF ovary had a greater responsive rate than primiparous cows bearing mAFC contralateral to the DF ovary (55.0% vs. 20.0%, p < 0.05). In mAFC ipsilateral to the DF ovary, responsive and pregnancy rates were greatest (p < 0.05) in multiparous cows bearing mAFC and DF on the right ovary compared with multiparous cows bearing mAFC and DF on the left ovary (58.1% and 22.6% vs. 25.8% and 3.2%, respectively). Furthermore, there was a positive correlation between the mean diameter of AFC at the time of the exogenous hormonal trigger and the mean diameter of DF at the completion of hormonal synchronisation (p < 0.05). Our findings emphasise that the ovarian interrelationship with unilateral mAFC at the time of the hormonal trigger might be a promising biomarker for predicting success in ovarian response to hormonal stimulation of mono-ovulatory Bos indicus beef cows with low AFCs.
Collapse
Affiliation(s)
- Warittha U-krit
- Department of Animal and Aquatic Sciences, Faculty of Agriculture, Chiang Mai University, Chiang Mai 50200, Thailand; (W.U.-k.); (P.Y.); (M.S.); (N.P.); (N.M.)
- Chiang Mai College of Agriculture and Technology, Sanpatong 50120, Thailand
| | | | - Punnawut Yama
- Department of Animal and Aquatic Sciences, Faculty of Agriculture, Chiang Mai University, Chiang Mai 50200, Thailand; (W.U.-k.); (P.Y.); (M.S.); (N.P.); (N.M.)
| | - Jakree Jitjumnong
- Department of Animal Science, National Chung Hsing University, Taichung 40227, Taiwan; (J.J.); (P.-C.T.)
| | - Molarat Sangkate
- Department of Animal and Aquatic Sciences, Faculty of Agriculture, Chiang Mai University, Chiang Mai 50200, Thailand; (W.U.-k.); (P.Y.); (M.S.); (N.P.); (N.M.)
| | - Nalinthip Promsao
- Department of Animal and Aquatic Sciences, Faculty of Agriculture, Chiang Mai University, Chiang Mai 50200, Thailand; (W.U.-k.); (P.Y.); (M.S.); (N.P.); (N.M.)
| | - Napatsorn Montha
- Department of Animal and Aquatic Sciences, Faculty of Agriculture, Chiang Mai University, Chiang Mai 50200, Thailand; (W.U.-k.); (P.Y.); (M.S.); (N.P.); (N.M.)
| | - Paiwan Sudwan
- Department of Anatomy, Faculty of Medicine, Chiang Mai University, Chiang Mai 50200, Thailand;
| | - Raktham Mektrirat
- Department of Veterinary Biosciences and Veterinary Public Health, Faculty of Veterinary Medicine, Chiang Mai University, Chiang Mai 50100, Thailand;
| | - Julakorn Panatuk
- Faculty of Animal Science and Technology, Maejo University, Chiang Mai 50290, Thailand;
| | - Wilasinee Inyawilert
- Department of Agricultural Science, Faculty of Agriculture, Natural Resources and Environment, Naresuan University, Phitsanulok 65000, Thailand;
| | - Payungsuk Intawicha
- Division of Animal Science, School of Agriculture and Natural Resources, University of Phayao, Phayao 56000, Thailand;
| | - Pin-Chi Tang
- Department of Animal Science, National Chung Hsing University, Taichung 40227, Taiwan; (J.J.); (P.-C.T.)
- The iEGG and Animal Biotechnology Center, National Chung Hsing University, Taichung 40227, Taiwan
| | - Tossapol Moonmanee
- Department of Animal and Aquatic Sciences, Faculty of Agriculture, Chiang Mai University, Chiang Mai 50200, Thailand; (W.U.-k.); (P.Y.); (M.S.); (N.P.); (N.M.)
- Innovative Agriculture Research Center, Faculty of Agriculture, Chiang Mai University, Chiang Mai 50200, Thailand
- Correspondence: ; Tel.: +66-53-944342
| |
Collapse
|
2
|
Furukawa E, Masaki T, Sakaguchi K, Bo M, Yanagawa Y, Ueda K, Nagano M. Relationship between the timing of the first postpartum ovulation and antral follicle counts in Holstein cows. J Ovarian Res 2020; 13:7. [PMID: 31926556 PMCID: PMC6954630 DOI: 10.1186/s13048-020-0610-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2019] [Accepted: 01/06/2020] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND The timing of the first postpartum ovulation is an important factor affecting the timing of estrous resumption in dairy cows. The first postpartum ovulation is delayed in cows producing large amounts of milk with an intensive negative energy balance. The antral follicle count (AFC) and serum anti-Müllerian hormone concentrations are known to be indicators of the ovarian reserve, which is the number and quality of follicles left in a pair of ovaries and known as an indicator of female fertility. Cows with higher AFC have been proven to show higher pregnancy rate and shorter calving to conception intervals; however, the relationship between the timing of the first postpartum ovulation and ovarian reserve remains unclear. Therefore, this study examined the relationships between postpartum follicular dynamics, the ovarian cycle, nutritional status, and ovarian reserve. METHODS Transrectal ultrasonography was conducted from calving to 70-120 days in milk (DIM) in 26 cows to monitor AFC, follicular dynamics and the ovarian cycle. Body weight (BW) and milk yield were used as indicators of nutritional status. RESULTS The first postpartum ovulation was significantly later in cows with low AFC (< 25) than in those with high AFC (≥25), while changes in BW from calving to the nadir and milk production were similar in both groups. The present results also suggested that cows with low AFC and a delayed first postpartum ovulation had a shorter first ovarian cycle after the first postpartum ovulation. The mean DIM of the first postpartum artificial insemination (AI) and days open (days from calving to AI with which pregnancy was achieved) were similar in high and low AFC groups. CONCLUSIONS The first postpartum ovulation was significantly earlier in cows with high AFC than in those with low AFC. The assumed reason for this result was higher sensitivity to luteinizing hormone and larger androstenedione and estradiol production in follicles in high AFC cows. Therefore, cows with high AFC may be more fertile than those with low AFC while their milk production increase and BW decrease; it means they are in negative energy balance. (340/350 words).
Collapse
Affiliation(s)
- Eri Furukawa
- Laboratory of Theriogenology, Graduate School of Veterinary Medicine, Hokkaido University, Sapporo, 060-0818, Japan
| | - Tomoyuki Masaki
- Laboratory of Theriogenology, Graduate School of Veterinary Medicine, Hokkaido University, Sapporo, 060-0818, Japan
| | - Kenichiro Sakaguchi
- Laboratory of Theriogenology, Graduate School of Veterinary Medicine, Hokkaido University, Sapporo, 060-0818, Japan
| | - Min Bo
- Laboratory of Animal Production System, Graduate School of Agriculture, Hokkaido University, Sapporo, 060-8589, Japan
| | - Yojiro Yanagawa
- Laboratory of Theriogenology, Faculty of Veterinary Medicine, Hokkaido University, Sapporo, 060-0818, Japan
| | - Koichiro Ueda
- Laboratory of Animal Production System, Research Faculty of Agriculture, Hokkaido University, Sapporo, 060-8589, Japan
| | - Masashi Nagano
- Laboratory of Theriogenology, Faculty of Veterinary Medicine, Hokkaido University, Sapporo, 060-0818, Japan. .,Laboratory of Animal Reproduction, Department of Animal Science, School of Veterinary Medicine, Kitasato University, Towada, 034-8628, Japan.
| |
Collapse
|
3
|
Cushman RA, Soares ÉM, Yake HK, Patterson AL, Rosasco SL, Beard JK, Northrop EJ, Rich JJJ, Miles JR, Chase CC, Gonda MG, Perry GA, McNeel AK, Summers AF. Brangus cows have ovarian reserve parameters more like Brahman than Angus cows. Anim Reprod Sci 2019; 209:106170. [PMID: 31514925 DOI: 10.1016/j.anireprosci.2019.106170] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2019] [Revised: 07/15/2019] [Accepted: 08/19/2019] [Indexed: 11/18/2022]
Abstract
Bos indicus females have more surface antral follicles than Bos taurus females; however, histological studies demonstrated no difference in total number of primordial follicles between these two biological types of cattle. Primordial follicle density in the ovary was less in Nelore ovaries compared to Angus ovaries, but no studies have examined the primordial follicle density in Bos indicus cross-bred females. It, therefore, was hypothesized that primordial follicle density in the ovary would decrease as percentage Bos indicus increased. Ovaries were collected from cross-bred Angus (n = 32, no Bos indicus influence), Brangus (n = 15), or Brahman (n = 9) cows and prepared for histological evaluation. There was no difference in total number of primordial follicles per ovary between breeds (P > 0.10). When numbers of primordial follicles were expressed on a per gram of ovarian tissue basis, there were fewer primordial follicles per gram of ovarian tissue in Brangus and Brahman cows than in Angus cows (P < 0.05). Brangus cows did not differ from Brahman cows in primordial follicle density (P > 0.10). Differences in primordial follicle density could indicate differences in capacity of ovarian stroma to produce factors necessary for oogonial proliferation and primordial follicle formation among breeds. Identifying these factors could improve the aprroach for culturing pre-antral follicles of cattle. Furthermore, these results explain why ultrasonographic antral follicle counts may need to be adjusted to a greater threshold to predict size of the ovarian reserve and determine ovarian reserve related reproductive traits in Bos indicus females.
Collapse
Affiliation(s)
- Robert A Cushman
- USDA, ARS, U.S. Meat Animal Research Center, Clay Center, NE, USA.
| | - Émerson M Soares
- Federal University of Santa Maria, Animal Science Department, Santa Maria, RS, Brazil
| | - Hannah K Yake
- University of Tennessee, Animal Science Department, Knoxville, TN, USA
| | | | - Shelby L Rosasco
- New Mexico State University, Department of Animal and Range Sciences, Las Cruces, NM, USA
| | - Joslyn K Beard
- New Mexico State University, Department of Animal and Range Sciences, Las Cruces, NM, USA
| | - Emmalee J Northrop
- South Dakota State University, Department of Animal Science, Brookings, SD, USA
| | - Jerica J J Rich
- South Dakota State University, Department of Animal Science, Brookings, SD, USA
| | - Jeremy R Miles
- USDA, ARS, U.S. Meat Animal Research Center, Clay Center, NE, USA
| | - Chadwick C Chase
- USDA, ARS, U.S. Meat Animal Research Center, Clay Center, NE, USA
| | - Michael G Gonda
- South Dakota State University, Department of Animal Science, Brookings, SD, USA
| | - George A Perry
- South Dakota State University, Department of Animal Science, Brookings, SD, USA
| | - Anthony K McNeel
- USDA, ARS, U.S. Meat Animal Research Center, Clay Center, NE, USA
| | - Adam F Summers
- New Mexico State University, Department of Animal and Range Sciences, Las Cruces, NM, USA.
| |
Collapse
|