scholarly journals Factors influencing reproductive efficiency and pregnancy in Pura Raza Española mares

2017 ◽  
Vol 62 (No. 4) ◽  
pp. 186-191
Author(s):  
A. Akourki ◽  
A. Echegaray ◽  
MV Falceto ◽  
O. Mitjana
Keyword(s):  
Pregnancy Loss ◽  
Post Partum ◽  
Reproductive Efficiency ◽  
Ovarian Activity ◽  
Gestation Length ◽  
Ovulatory Follicle ◽  
Follicle Size ◽  
Spss Software ◽  
Twin Pregnancies ◽  
Length Of Gestation

The aim of this study was to analyse ovarian activity and pregnancy in 140 Pura Raza Espanola mares over a period of two consecutive years. The data were analysed using SPSS software to evaluate the effects of age, category of mares and season on pre-ovulatory follicle size, ovulation rate, interval from foaling to pregnancy, gestation length, incidence of twin pregnancies and pregnancy losses. The results showed that follicular diameter was significantly (P < 0.05) smaller in fillies (3-year-old) and maiden mares than in older and multiparous mares. Within the group of animals treated with gonadotropin hormone hCG, 87.23% ovulated 48 h following administration. Length of gestation varied from 305 to 356 days and all gestation pregnancies of less than 305 days resulted in a non-viable foal. In addition, foaling season affected (P < 0.05) the post-partum conception interval and the length of gestation, which were shorter and longer in the winter foaling, respectively. Regarding the other parameters, mares of this stud exhibited relatively very low rates of double ovulations, twin pregnancies and pregnancy losses. We conclude that age and category of mares and foaling season influence fertility and foaling rates by affecting pre-ovulatory follicle size, pregnancy loss and gestation length.

scholarly journals Reproductive Efficiency of BLRI Cattle Breed-1 at Farm Condition

2013 ◽  
Vol 19 (2) ◽  
pp. 85-92 ◽  
Author(s):  
GK Deb ◽  
MMR Mufti ◽  
MP Mostari ◽  
KS Huque
Keyword(s):  
Post Partum ◽  
Winter Season ◽  
Cattle Breed ◽  
Breeding Strategy ◽  
Reproductive Efficiency ◽  
Gestation Length ◽  
Cattle Breeding ◽  
Indigenous Cattle ◽  
Native Cattle ◽  
Heat Period

The BLRI Cattle Breed 1(BCB-1) is a native cattle breed developed by Bangladesh Livestock Research Institute (BLRI) through selective breeding among indigenous cattle of Bangladesh. Data asserted from record sheets of 529 animals maintained during 1992 to 2006 were analyzed to evaluate the reproductive efficiency of BCB-1 cattle in different generations, seasons and parities. The highest percent of animals showed heat during summer season (36.88%) followed by rainy (35.73%) and winter season (27.39%). The highest percent of calving was recorded in summer (43.1%) followed by rainy (31%) and winter (26%). Sex ratio of male: female calves born according to season was the highest in summer (106.31:100) intermediate in rainy (106.06: 100) and lowest in winter (105.00:100). Age at first heat (AFH), age at first calving (AFC), calving interval (CI), service per conception (SPC), gestation length (GL) and post partum heat period (PPHP) of BCB-1 cows were 843.65±17.77, 1225.24±258.92, 451.65±6.51, 1.50±0.83, 283.31±11.50, and 105.51±3.95 days, respectively. AFS and PPHP varied with generation (p<0.01) and that of SPC and PPHP with parity of dams (p<0.05). However, AFC, GL and CI of BCB-1 females did not vary with parity, generation or season of birth. It was concluded that the overall reproductive performances of BCB-1 cattle are within the range of other indigenous cattle of Bangladesh and the at such results of reproductive characteristics may be used for planning cattle breeding strategy of the country.DOI: http://dx.doi.org/10.3329/pa.v19i2.16948 Progress. Agric. 19(2): 85 - 92, 2008

scholarly journals 227OVARIAN FOLLICULAR DYNAMICS IN POSTPARTUM MEDITERRANEAN ITALIAN BUFFALOES

2004 ◽  
Vol 16 (2) ◽  
pp. 235
Author(s):  
G.A. Presicce ◽  
G. De Santis ◽  
E.M. Senatore
Keyword(s):  
Post Partum ◽  
High Rate ◽  
Day Length ◽  
Purulent Discharge ◽  
Pharmacological Intervention ◽  
Reproductive Efficiency ◽  
Ovarian Activity ◽  
Leading Role ◽  
Ultrasound Monitoring ◽  
Follicular Dynamics

In cattle and buffaloes resumption of ovarian activity, as expressed by first post partum ovulation and follicle turnover leading to periodic estrus cycles and ovulations, can be affected by many factors among which uterine infections and dietary supplementation play a leading role. In addition, buffaloes are considered seasonal animals characterized by a tendency to reproduce in correspondence to a decrease of day length. This aspect may further affect their reproductive efficiency by delaying or interrupting ovarian activity if calving occurs in transitional (i.e., from end winter into beginning of spring) or unfavourable (spring-summer) periods of the year, when an increase of daylight hours occurs. The aim of this study, carried out in the months of February to May, was to understand the effect of increasing daylight hours over resumption of postpartum ovarian follicular dynamics and estrus cycles. Mixed parity Mediterranean Italian buffaloes (n=20) were monitored daily by ultrasonography from calving until first postpartum ovulation and following cycle or until 60 days if no ovulations had been recorded. Ultrasound monitoring was performed by using a 7.5MHz linear-array probe and an Aloka SSD-500 monitor. No pharmacological intervention was allowed during the course of the study and animals were kept under similar feeding and farm management conditions. All animals exhibited a mild to moderate uterine inflammation (n=13; 65%) or aspecific infection (n=7; 35%) after calving. Infections were manifested as purulent discharge and as ultrasound detection of highly echogenic debries in the uterine lumen. Only one animal retained pathological accumulation in both horns for the entire duration of the study. Among the 20 buffaloes under study, 12 (60%) exhibited postpartum ovulations, ranging from 9 to 45 days. In eight buffaloes (40%), such ovulations occurred in the ovary contralateral to the ovary bearing the gravidic CL. Following postpartum ovulations, seven buffaloes (35%) underwent a complete cycle leading to ovulation. Three of such cycles (15%) culminated with a second ovulation in the same ovary where post partum ovulations had occurred. Among the full cycles following postpartum ovulations, four of them were one-wave, with a range of 8 to 19 days, whereas the remaining three cycles were two-wave with a range of 17 to 22 days. Eight buffaloes (40%) were reported in anovulatory condition following parturition, although in four of them both ovaries displayed a typical follicle turnover. In conclusion, resumption of ovarian activity and reproductive efficiency in water buffaloes can be affected by increasing day length as evidenced by a high rate of postpartum anovulatory conditions and reduced follicle turnover.

scholarly journals Pregnancy and stillbirth losses in dairy cows with singleton and twin pregnancies

2019 ◽  
Vol 67 (1) ◽  
pp. 115-126 ◽  
Author(s):  
Zoltán Szelényi ◽  
Dorottya Győri ◽  
Szabolcs Boldizsár ◽  
Levente Kovács ◽  
Attila Répási ◽  
...  
Keyword(s):  
Dairy Cows ◽  
Early Pregnancy ◽  
Pregnancy Loss ◽  
Twin Pregnancy ◽  
Corpora Lutea ◽  
Holstein Friesian ◽  
Twin Pregnancies ◽  
Time Point ◽  
Length Of Gestation ◽  
Friesian Cows

The aim of this study was to examine the effect of twin pregnancy, fetal laterality, the number of corpora lutea (CL) and cavitary CL on pregnancy losses in Holstein-Friesian cows with a positive pregnancy diagnosis based on ultrasonography between days 29–42 after AI. Pregnancy was confirmed by transrectal palpation between days 57–70 after AI and at the time of drying-off as well. Twin pregnancy rate was 8.4% at the time of the early pregnancy examination. Pregnancy loss did not differ between singleton- and twin-carrying animals either between days 57–70 of gestation or at drying-off. More losses occurred in singletons between days 29–42 and 57–70 in cows with cavitary than in cows with noncavitary CL (12.1% vs. 3.6%; P < 0.05) and in cows with double CL than in cows with single CL (7.3% vs. 3.6% %; P < 0.05). Between days 57–70 of gestation and drying-off this difference was still significant (20.7% vs. 3.7%; P < 0.001), while it was non-significant between cows with one CL (5.7%) vs. double CL (3.7%). Cavity occurrence was not affected by hormone therapy prior to AI (either PGF2α or OvSynch; 4.4% vs. 5.4%, respectively); however, the number of CL was reduced by the treatments (11.6 vs. 19.6%; P < 0.0005). In twin pregnancies there was no difference in the pregnancy losses between bilateral and unilateral pregnancies at any time point. The length of gestation was 278.2 ± 10.5 (singleton) and 267.4 ± 31.2 (twin) days, respectively (P < 0.01). The stillbirth ratio was higher in twin carriers than in singleton carriers (19.5% vs. 5.3%; P < 0.001).

Effect of immediate post-partum uterine treatment on subsequent reproductive efficiency

1983 ◽  
Vol 19 (6) ◽  
pp. 811-815 ◽  
Author(s):  
H.H. Dowlen ◽  
R.L. Murphree ◽  
D.O. Richardson ◽  
J.R. Owen
Keyword(s):  
Post Partum ◽  
Reproductive Efficiency

Spontaneous loss of a co-twin and the risk of birth defects after assisted conception

2016 ◽  
Vol 7 (6) ◽  
pp. 678-684 ◽  
Author(s):  
M. J. Davies ◽  
A. R. Rumbold ◽  
M. J. Whitrow ◽  
K. J. Willson ◽  
W. K. Scheil ◽  
...  
Keyword(s):  
Birth Defects ◽  
Pregnancy Loss ◽  
Multiple Pregnancy ◽  
Fetal Loss ◽  
South Australia ◽  
Increased Risk ◽  
Study Population ◽  
Infertility Patients ◽  
Twin Pregnancies ◽  
Singleton Pregnancies

The study of very early pregnancy loss is impractical in the general population, but possible amongst infertility patients receiving carefully monitored treatments. We examined the association between fetal loss and the risk of birth defects in the surviving co-twin in a retrospective cohort study of infertility patients within an infertility clinic in South Australia from January 1986 to December 2002, linked to population registries for births, terminations and birth defects. The study population consisted of a total of 5683 births. Births from singleton pregnancies without loss were compared with survivors from (1) pregnancies with an empty fetal sac at 6–8 weeks after embryo transfer, (2) fetal loss subsequent to 8-week ultrasound and (3) multiple pregnancy continuing to birth. Odds ratios (OR) for birth defects were calculated with adjustment for confounders. Amongst infertility patients, the prevalence of birth defects was 7.9% for all twin pregnancies without fetal loss compared with 14.6% in pregnancies in which there had been an empty sac at ultrasound, and 11.6% for pregnancies with fetal loss after 6–8 weeks. Compared with singleton pregnancies without loss, the presence of an empty sac was associated with an increased risk of any defect (OR=1.90, 95% confidence intervals (CI)=1.09–3.30) and with multiple defects (OR=2.87, 95% CI=1.31–6.28). Twin pregnancies continuing to birth without loss were not associated with an overall increased prevalence of defects. We conclude that the observed loss of a co-twin by 6–8 weeks of pregnancy is related to the risk of major birth defects in the survivor.

scholarly journals Reproductivity, Productivity and Management System of Indigenous Buffalo (Bubalus bubalis) Cows in Costal Areas of Pirojpur and Borguna District of Bangladesh

2014 ◽  
Vol 24 (1-2) ◽  
pp. 117-122 ◽  
Author(s):  
MR Karim ◽  
MZ Hossain ◽  
MR Islam ◽  
MS Parvin ◽  
MA Matin
Keyword(s):  
Birth Weight ◽  
Milk Yield ◽  
Management System ◽  
Post Partum ◽  
Bubalus Bubalis ◽  
Gestation Length ◽  
Calving Interval ◽  
Lactation Length ◽  
Daily Milk Yield ◽  
Daily Milk

Twenty five buffalo cows of Mothbaria Upazila of Pirojpur district and another twenty five indigenous buffalo cows of Pathorghata Upazila of Borguna district of Bangladesh were randomly selected and interviewed to collect data on reproductivity (gestation length, birth weight, age of first calving, post partum heat and calving interval), productivity (lactation length and daily milk yield) and management system (general management, housing, feeding, calf rearing and treatment facilities) of indigenous buffalo cows using pre-tested questionnaire during the period from January to June 2010. The reproductive parameters including gestation length, birth weight, age of first calving, post partum heat and calving interval of Mothbaria Upazila of Pirojpur district were 319.56 ± 5.93 days, 24.28 ± 4 kilograms, 50.88 ± 1.71 months, 153.6 ± 6.13 days, 547.92 ± 10.88 days respectively whereas in case of Pathorghata Upazila of Borguna district these parameters were 319.12 ± 4.69 days, 24.12 ± 3.6 kilograms, 51 ± 1.8 months, 153.44 ± 6.78 days, 547.24 ± 14.32 days respectively. The productive parameters including lactation length and daily milk yield of Mothbaria Upazila of Pirojpur district were 286.12 ± 11.27 days and 3.33 ± 0.68 liters/day respectively while in case of Pathorghata Upazila of Borguna district these parameters 290.44 ± 10.92 days and 3.43 ± 0.744 liters/day respectively. So, reproduction and production are almost regular comparing with other published reports with the exception of age of first calving which is almost 12 months later than the buffaloes of other countries. It could be concluded that the buffalo owners of these areas do not follow any scientific method of buffalo husbandry; they just follow traditional rearing system. The farmers mostly use buffaloes for draught purpose in these costal areas.DOI: http://dx.doi.org/10.3329/pa.v24i1-2.19113 Progress. Agric. 24(1&2): 117 - 122, 2013

Reproductive performance of Shorthorn and Brahman crossbred cows in the dry tropics of north Queensland

1979 ◽  
Vol 19 (98) ◽  
pp. 276 ◽  
Author(s):  
RG Holroyd ◽  
PK O'Rourke ◽  
PJ Allan
Keyword(s):  
Reproductive Performance ◽  
Experimental Period ◽  
Ovarian Activity ◽  
Gestation Length ◽  
Variable Effect ◽  
Crossbred Cows ◽  
Lactating Cows ◽  
Dry Tropics ◽  
Significant Difference ◽  
Conception Rates

A study was made (1 970 to 1973) of the reproductive performance of Shorthorn and Brahman crossbred cows grazing pasture in the dry tropics of north Queensland. Breed had a variable effect on the conception rates of lactating cows, with Brahman crossbreds having significantly higher (P < 0.05) conception rates in the first year. The two breeds had similar conception rates in the following year. In the third year, overall conception rates of both breeds were reduced due to a prolonged dry season, with Shorthorn cows having significantly higher (P < 0.01) conception rates than Brahman cows. However, during this dry period, twice as many Shorthorn cows required survival feeding as did Brahman cows. Calving rates followed conception rates closely, prenatal loss in each breed being low. In all years, Shorthorns had significantly earlier (P < 0.05) calving dates than Brahmans. The interval from calving to first recorded ovarian activity was significantly longer (P < 0.05) in Brahman cross than in Shorthorn cows in only one of the three years. There was no significant difference between breeds for the interval from first recorded ovarian activity to conception, but this interval decreased with increasing age of the cow. Breed had a variable effect on gestation length. Brahman cows were generally heavier each year in April and in better condition throughout the experimental period than Shorthorn cows.

scholarly journals Occurrence and practical solvent possibility of gilts preinsemination anestrus

2010 ◽  
Vol 26 (1-2) ◽  
pp. 37-46 ◽  
Author(s):  
I. Stancic ◽  
M. Gagrcin ◽  
M. Jovicin ◽  
S. Jovanovic
Keyword(s):  
Body Weight ◽  
Sexual Maturity ◽  
Good Health ◽  
Reproductive Efficiency ◽  
Ovarian Activity ◽  
Genetic Traits ◽  
Paper Review

Gilts reproductive efficiency is one of the primary factors of successful piglets' production. This performance, among other things, is expresses by the number of pregnant gilts, with desirable genetic traits, body weight and age, sexual maturity status, and general good health, provided for the replacement of sows in primary herd. This goal is very difficult to achieve in practical conditions. The main reason is occurrence of prolonged preinsemination anoestrus (oestrus was not detected even after 8 months of age). This paper review the occurrence of prolonged preinsemination anoestrus, based on the results of our and study of other authors. All studies consistently show that, in most of these gilts, pubertal cyclic ovarian activity were established, that silent oestrus occurred in only 4% of the cyclic gilts, and that this problem can be solved by applying appropriate technologies for oestrus detection, and by treatment with adequate hormonal preparations.

Sign in / Sign up

Export Citation Format

Share Document