The inter-ovarian distribution of dominant follicles is influenced by the location of the corpus luteum of pregnancy

Nation, D.P; Burke, Christopher R.; Rhodes, F.M.; Kl, Macmillan

doi:10.1016/s0378-4320(99)00034-2

Cited by 21 publications

(10 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In this study, ovulation in right ovary was higher (72%) than in the left (Table 3). It was in line with Vasenna et al (2003) and Nation et al (1999) who reported that ovulation more often occurred in the right ovary than in the left. However, Purwantara et al (2006) and Ginther et al (1989) reported balance ovulation in the right and left ovary.…”

Section: Observation Valuesupporting

confidence: 87%

Follicular dynamic and repeatability of follicular wave development in Peranakan Ongole (PO) cattle

Imron¹,

Supriatna²,

Amrozi³

et al. 2016

JITV

View full text Add to dashboard Cite

<p class="abstrak2">Superovulation treatment on PO cattle (Bos indicus) was less responsive compared to Bos taurus breed. It might due to the difference of their follicular dynamic. This study was conducted to investigate the follicular dynamics and its repeatability in PO cattle. Follicular dynamics observations conducted on 9 cows trough ultrasound scanning every day. Observations of wave patterns repeatability were performed in 6 cows which its wave pattern already known on the next consecutive IOI. Research result indicated that PO cattle had 3 (66%) and 4-waves (34%) pattern. The first wave of 3 and 4-waves pattern emerged on day -0.4+0.9 and 1.4+1.1 respectively. The second wave of 3 and 4-wave pattern emerged on day 9.8+1.5 and 7.4+1.9 respectively. The pattern of 3 waves has a longer follicle dominant duration (11.6+1.5 day) in the first wave of estrous cycle, compared with 4 waves pattern (10+2.92 and 7+1.00 day respectively). The growth rate of dominant follicle was not different significantly between the 3 and 4-waves pattern (0.87+0.23 and 0.94+0.25 mm/day respectively). Similarly, ovulatory follicle diameter between 3 and 4-waves pattern was also not different significantly (12.24+12.34 and 12.30+12.23 mm respectively). Observation of wave patterns repeatability in 6 PO cows indicated that PO cattle had high repeatability in follicular wave pattern (0.88) and the number of growing follicle was 0.91. This study resulted data for dynamic of follicular development, wave pattern, its repeatability which be expected to design the protocol of superovulation treatment or other reproduction technologies based on follicular dynamic to improve its result in PO cattle.</p><p> </p>

show abstract

Section: Observation Valuesupporting

confidence: 87%

Follicular dynamic and repeatability of follicular wave development in Peranakan Ongole (PO) cattle

Imron¹,

Supriatna²,

Amrozi³

et al. 2016

JITV

View full text Add to dashboard Cite

show abstract

“…Interestingly, there was a slight negative correlation between ovulation rates of an ovary from one cycle to the next because ovulations tended to occur on the ovary opposite of the previous ovulation site(s). This effect is well-documented with the CL of pregnancy (Saiduddin et al, 1967;Nation et al, 1999;Bridges et al, 2000), and one hypothesis is that local factors involved in the regression of the CL of pregnancy may inhibit development of a dominant follicle (Saiduddin et al, 1967;Spicer et al, 1986;Nation et al, 1999). Therefore, regression of the previous CL in the consecutive cycles examined in the present study may influence the location of the dominant follicle in a subsequent cycle.…”

Section: Discussionmentioning

confidence: 53%

Evaluation of ovulation rate and ovarian phenotype in puberal heifers from a cattle population selected for increased ovulation rate1,2

Cushman

Allan

Snowder

et al. 2005

Journal of Animal Science

View full text Add to dashboard Cite

Long-term selection for increased ovulation rate (1984 to 2002) has resulted in a unique ovarian phenotype in the MARC Twinner cattle population. Ovulation rate and frequency of bilateral ovulations were examined by rectal palpation in 29,547 estrous cycles for 3,910 heifers (12 to 18 mo of age) in this population. Bilateral ovulations (one corpus lutuem [CL] on each ovary) were of interest because bilateral twin pregnancies result in decreased dystocia and increased calf survival. Ovulation rate increased linearly at a rate of 0.026 CL per year, and it currently averages 1.48 +/- 0.04 CL per estrous cycle. Concurrent with the increase in ovulation rate, the frequency of triplet ovulations increased from 0% to 2.3 +/- 0.8% (P < 0.001). Ovulation rate of both the right and left ovary increased equally at a rate of 0.013 CL per year, and mean ovulation rate of the right ovary remained greater than mean ovulation rate of the left ovary throughout the study (0.66 vs. 0.55 +/- 0.003 CL per estrous cycle; P < 0.001). Although correlations were low, ovulation rate of one ovary was negatively correlated (P < 0.001; r = -0.07) with ovulation rate of the same ovary in the previous estrous cycle, but positively correlated (P < 0.001; r = 0.13) with the contralateral ovary of the previous estrous cycle. The proportion of bilateral ovulations averaged 55.7 +/- 0.7%, a value greater than the predicted 49.5% (P < 0.001). In addition to dystocia and retained placenta, triplet pregnancies increase the incidence of pregnancies gestating fetuses of opposite sexes and subsequent incidence of freemartins; thus, selection pressure on ovulation rate may need to be adjusted in the MARC Twinner population. The proportion of bilateral ovulations in the population is greater than expected, and this may be an economically important trait, which will respond to selection and be beneficial for improving bovine reproductive efficiency. Understanding factors controlling the increased functional activity of the right ovary and bilateral ovulations may provide further insights into the mechanisms controlling follicle selection and methods to improve reproductive management of cattle.

show abstract

“…The dominant follicle of the fi rst ovarian follicle wave could be detected using ultrasonography within 10 days postpartum, usually on the ovary contralateral to the one which contained the CL which sustained the preceding pregnancy (Nation et al 1999). McDougall et al (1995a) also showed that the average maximum diameter of the fi rst dominant follicle was 10mm, and that this diameter increased by an average of 1.8mm with each successive wave of follicle development.…”

Section: Anovulatory Anoestrusmentioning

confidence: 99%

Advances in bovine theriogenology in New Zealand. 1. Pregnancy, parturition and the postpartum period

2002

New Zealand Veterinary Journal

View full text Add to dashboard Cite

Unique systems of breeding and calving management have been developed to allow New Zealand cattle herd owners to maintain seasonally concentrated calving patterns. Improved pastures are used as the sole ration for most beef and dairy cows with limited conservation and no grain feeding. Patterns of calving are described in relation to herd Planned Start of Calving (PSC) dates, calculated as 282 days after the fi rst date of insemination in the preceding seasonal artifi cial breeding (AB) programme. Corticosteroids have been systematically used in over 80% of New Zealand dairy herds to induce premature parturition (calving induction) during the third trimester of pregnancy for about 25 years, to condense calving patterns into periods of 6-12 weeks. Widespread use of calving induction has minimised the adverse effects of declining reproductive performance in dairy herds on the sustainability of seasonally concentrated calving. The use of calving induction is now discouraged on animal welfare grounds and due to possible consequences for the marketing of New Zealand dairy products.Recent declines in the reproductive performance of dairy herds are linked to increased prevalence of extended periods of postpartum anovulatory anoestrus (AA), which has become the major form of infertility in dairy herds in New Zealand and can be related to reliance on grazed pasture as the sole diet for cows of increasing genetic merit. The prevalence of AA is infl uenced by parity, breed, recent genetic origin within a breed, body condition score, herd and year. Management strategies such as oncedaily milking, preferential grazing or feeding of silage, have not proven as successful as hormonal treatments.Although seasonally concentrated calving has remained a standard feature of the industry's low-cost, pasture-based system of management, continuing research will be required to economically maintain this pattern.

show abstract

The inter-ovarian distribution of dominant follicles is influenced by the location of the corpus luteum of pregnancy

Cited by 21 publications

References 14 publications

Follicular dynamic and repeatability of follicular wave development in Peranakan Ongole (PO) cattle

Follicular dynamic and repeatability of follicular wave development in Peranakan Ongole (PO) cattle

Evaluation of ovulation rate and ovarian phenotype in puberal heifers from a cattle population selected for increased ovulation rate1,2

Advances in bovine theriogenology in New Zealand. 1. Pregnancy, parturition and the postpartum period

Contact Info

Product

Resources

About