Artificial insemination in Payoya goats: factors affecting fertility

2014 ◽  
Vol 54 (3) ◽  
pp. 356 ◽  
Author(s):  
Francisco Arrebola ◽  
Olga González ◽  
Rafael Torres ◽  
José-Alfonso Abecia
Keyword(s):  
Pregnancy Rate ◽  
Milk Production ◽  
Breeding Season ◽  
Group Size ◽  
Artificial Insemination ◽  
Age Group ◽  
Factors Affecting ◽  
Semen Collection ◽  
Frozen Semen ◽  
Critical Aspects

The present study was conducted to determine the effect of different factors on pregnancy rate after artificial insemination (AI) with refrigerated and frozen semen in Payoya goats reared under commercial farm conditions. A total of 820 goats, belonging to 10 farms, was used. The total number of studied inseminations was 1384 over a 4-year period. Factors considered in the study were year, farm, month of AI, age of the goat at AI, dose of progestagen, eCG dose, buck, type of semen (refrigerated or frozen), technician, number of goats to be inseminated (group size), incidences at AI (problems, no problems, trans-cervical insemination), distance from semen collection to farm, number of previous kidding, kidding–AI interval, and milk production. The variable studied was fertility, expressed as successful kidding. Mean fertility was 59%. Six (farm, age, group size, transcervical AI, number of kidding and milk production) of the 15 factors studied presented a significant (P < 0.05) effect on fertility after AI. Our results demonstrated that it is difficult to control all the critical aspects of AI programs at the farm level. These factors should be controlled and the variations that could compromise the chance of being pregnant must be known by technicians. The good fertility results obtained during the non-breeding season emphasise the implementation of this technique so as to improve the competitiveness of the dairy Payoya breed flocks.

19 FACTORS AFFECTING PREGNANCY RATE AFTER ARTIFICIAL INSEMINATION WITH EQUINE SEMEN: PRODUCTION OF THE FIRST FOAL USING FROZEN SEMEN IN KOREA

2011 ◽  
Vol 23 (1) ◽  
pp. 116
Author(s):  
Y. S. Park ◽  
Y. G. Cho ◽  
K. H. Cho ◽  
G. J. Cho
Keyword(s):  
Pregnancy Rate ◽  
Artificial Insemination ◽  
Technology Development ◽  
Skim Milk ◽  
Development Program ◽  
Field Trials ◽  
Pregnancy Rates ◽  
Chi Square ◽  
Semen Collection ◽  
Frozen Semen

Research in the area of equine artificial insemination (AI) has led to its increased application in field trials (Loomis and Graham, 2008). However, procedures for equine semen collection, cooling and freezing of semen and artificial insemination need further improvement. This study examined the effect of semen preparation and ovulation on equine AI success. Stallion semen was collected via artificial vagina, diluted with skim-milk extender, and preserved by either cooling to 4°C or cryopreservation and storage in liquid nitrogen. Mares were examined by ultrasound for follicle development with every 12 h during oestrus. During AI, semen was inserted into uterine horn adjacent to the ovulating follicle sized over 4 cm and irregular shape. In experiment 1, mares were inseminated with either cooled, cooled-transported, or frozen–thawed semen. Cooled semen was used immediately after collection and cooling. Cooled-transported semen was used 4 h after semen collection and dilution. Semen freezing procedure was followed by Moore et al. (2006). In experiment 2, we examined the effect of buffer (skim-milk extender), which was infused into the uterus at the time of AI with frozen–thawed semen. In experiment 3, we compared AI pregnancy rates for mares ovulating spontaneously v. after treatment with hCG. Pregnancy data were analysed Chi square test where P-values < 0.05 were considered significantly different. In experiment 1, the pregnancy rates after AI using cooled, cooled-transported, and frozen–thawed semen were 60 (10/6), 50 (8/4), and 37.5% (8/3), respectively, and similar among treatments. In experiment 2, the pregnancy rate of mares infused with buffer at AI was 37.5% (8/3) which was higher than that with no buffer (0%; 6/0). In experiment 3, the pregnancy rates of mares were similar between ovulated spontaneously (25%; 8/2) and ovulated with hCG (50%; 8/4). The results suggest that equine semen that has been cooled, cooled and transported or frozen can be successfully used to establish AI pregnancy. Also, the pregnancy rates after AI can be increased by infusing buffer into the uterus at AI or by inducing ovulation with hCG. These experiments resulted in the first foal produced in Korea with frozen–thawed equine semen. This research was supported by Technology Development Program for Agriculture and Forestry, Ministry for Food, Agriculture, Forestry and Fisheries, Republic of Korea.

SOME FACTORS AFFECTING PREGNANCY RATE DURING ARTIFICIAL INSEMINATION IN CATTLE

2019 ◽  
Vol 22 (07) ◽  
pp. 118-122
Author(s):  
Haider R. Abbas ◽  
Hussein A. Khamees ◽  
Jawad K. Taher
Keyword(s):  
Pregnancy Rate ◽  
Artificial Insemination ◽  
Factors Affecting

Efficiency of mating, artificial insemination or resynchronisation at different times after first timed artificial insemination in postpartum Nellore cows to produce crossbred calves

2019 ◽  
Vol 59 (2) ◽  
pp. 225 ◽  
Author(s):  
Walvonvitis Baes Rodrigues ◽  
Jean do Prado Jara ◽  
Juliana Correa Borges ◽  
Luiz Orcirio Fialho de Oliveira ◽  
Urbano Pinto Gomes de Abreu ◽  
...  
Keyword(s):  
Pregnancy Rate ◽  
Breeding Season ◽  
Chorionic Gonadotropin ◽  
Artificial Insemination ◽  
Fixed Time ◽  
Beef Cows ◽  
Device Removal ◽  
Oestradiol Benzoate ◽  
Timed Artificial Insemination ◽  
Equine Chorionic Gonadotropin

The objective of this trial was to evaluate different post-timed artificial insemination (TAI) reproductive managements in postpartum beef cows to produce crossbred calves from artificial insemination (AI). Nellore cows (n = 607), with 45 days postpartum, were inseminated at a fixed time, using a protocol that included an intravaginal progesterone-releasing device along with oestradiol benzoate, prostaglandin, equine chorionic gonadotropin, and oestradiol cypionate, followed TAI 48 h post-device removal. Four post-TAI treatments were evaluated: in CONTROL (T1, n = 161), cows were exposed to Nellore clean-up bulls until the end of the breeding season (75 days). In OBSERVATION (T2, n = 132), heat detection was performed for 15–25 days post-TAI, followed by AI. In RESYNC22 (T3, n = 157) and RESYNC30 (T4, n = 157), resynchronisation started after 22 or 30 days, following second TAI at Day 32 or 40 days after first TAI. In T2, T3 and T4, after the second AI, cows were exposed to Nellore clean-up bulls until the end of the breeding season (75 days). The pregnancy rate (PR) for the first TAI did not differ (54.6%, 53.0%, 59.2%, and 51.6% for CONTROL, OBSERVATION, RESYNC 22, and RESYNC 30, respectively; P = 0.66), and no difference was observed for the second TAI (RESYNC 22 = 45.31% and RESYNC30 = 46.05%; P = 0.137), in the PR at the end of the breeding season (86.33%, 86.36%, 78.98%, and 81.52%, P = 0.43), or embryonic losses (4.54%, 2.85%, 6.45% and 7.40%, respectively; P = 0.61), but the percentage of crossbred pregnancy was higher in groups with resynchronisation (RESYNC22 and RESYNC30) than CONTROL and OBSERVATION (98.38%, 90.62%, 63.30%, 78.95%, P &lt; 0.001). In conclusion, resynchronisation programs of 22 or 30 days are more efficient to produce AI products, and the final pregnancy rate is similar among the treatments, differing only in the amount of calves produced by AI.

scholarly journals Estrus and pregnancy rate of Simmental-Ongole Crossbred and Ongole Grade heifer after being synchronized and inseminated

2018 ◽  
Vol 43 (4) ◽  
pp. 438
Author(s):  
S. Sutiyono ◽  
D. Samsudewa ◽  
A. Suryawijaya
Keyword(s):  
Pregnancy Rate ◽  
Artificial Insemination ◽  
Reproductive Organs ◽  
Estrus Synchronization ◽  
Purposive Sampling ◽  
Frozen Semen ◽  
Research Population ◽  
Rectal Palpation

The aim of the study was to examine the synchronization of estrus and artificial insemination in heifers of Ongole grade and Simental-Ongole grade. The research used 19 Ongole Grade (OG) and 18 Simental-Ongole Crossbred (SOC) heifers. This research applied purposive sampling to determine the research population. The criteria to select the population were heifers which have in mature body. The normality of heifer’s reproductive organs were identified by performing rectal palpation, then 50 mg of medroxy progesterone acetate on vaginal sponge was used to synchronized estrus. The estrus heifer was inseminated using frozen semen. The observed parameters were the number of heifers with normal and abnormal reproductive organs, estrus sign and pregnancy. Data were analyzed descriptively. This study showed that OG and SOC with abnormal reproductive organs was 1 heifer (5.56%) and 7 heifers (36.84%), respectively. The responses of estrus synchronization in heifers with normal and abnormal reproductive organs were 94.17% and 100% in OG, and 100% and 42.86% in SOC. Meanwhile, the pregnancy rate was 70.59 and 0% in OG, and 50.00 and 0% in SOC. In conclusion, the number of SOC heifers with abnormal reproductive organs is higher than OG. Estrus synchronization using 50 mg medroxy progesterone acetate increase the amount of estrus and pregnancy in heifers with normal reproductive organs.

The influence of purified porcine relaxin on the reproductive performance of sows following artificial insemination with fresh or frozen semen

1991 ◽  
Vol 71 (1) ◽  
pp. 237-239 ◽  
Author(s):  
P. A. Thacker ◽  
A. D. Gooneratne ◽  
R. N. Kirkwood
Keyword(s):  
Key Words ◽  
Pregnancy Rate ◽  
Litter Size ◽  
Reproductive Performance ◽  
Artificial Insemination ◽  
Pregnancy Rates ◽  
Frozen Semen

Pregnancy rates and litter sizes following insemination of sows with fresh-extended and frozen-thawed semen averaged 71 vs. 53% and 10.6 vs. 4.4, respectively, and was not affected by the addition of 12.5 μg relaxin to semen. These results indicate no relaxin mediated effect on either pregnancy rate or litter size when sows are artificially inseminated with relaxin-supplemented semen. Key words: Artificial insemination, relaxin, sows

scholarly journals Decreased bull fertility: age-related changes in sperm motility and DNA fragmentation

2020 ◽  
Vol 151 ◽  
pp. 01010
Author(s):  
Berlin P. Pardede ◽  
Iman Supriatna ◽  
Yudi Yudi ◽  
Muhammad Agil
Keyword(s):  
Dna Fragmentation ◽  
Sperm Motility ◽  
Artificial Insemination ◽  
Fertility Rate ◽  
Blue Staining ◽  
Age Group ◽  
Progressive Motility ◽  
Frozen Semen ◽  
Group 3 ◽  
Group 2

This study aimed to analyze the effect of the age of bulls on sperm motility and DNA fragmentation and its impact on fertility. Ninety-six frozen semen straw from eight bulls were divided into four groups based on age (group-1: 5-6 years; group-2: 7-8 years; group-3: 9-10 years; group-4: 11-12 years). Total and progressive motility were detected by using computer-assisted semen analysis (CASA), while DNA fragmentation was detected by Toluidine blue staining. Over 500 artificial insemination services in the field were used for fertility rate analysis. The results of the analysis of total motility, progressive, and DNA fragmentation in all age groups still meet the minimum standard for artificial insemination programs. Analysis of progressive motility and DNA fragmentation showed significant differences in each age group (P<0.01), whereas analysis of total motility showed no significant differences in group-2 (7-8 years) and group-3 (9-10 years) (P>0.01). Increased age in bulls correlated significantly with increased sperm DNA fragmentation (P<0.01), decreased total and progressive motility (P<0,01), and potentially reduced the fertility rate (P<0.01). In conclusion, although the quality of frozen semen still meets the standards for artificial insemination programs, the age factor in bulls needs to be considered for achieving maximum fertility.

Pregnancy and repeat breeding rate of high producing dairy cows for morning, evening or night artificial insemination

2014 ◽  
Vol 12 (4) ◽  
pp. 236
Author(s):  
José Carlos dos Santos Breda ◽  
Luiz Ernandes Kozicki ◽  
Márcio Saporski Segui ◽  
Alceu Miguel Grebogi ◽  
Romildo Romualdo Weiss ◽  
...  
Keyword(s):  
Dairy Cows ◽  
Pregnancy Rate ◽  
Milk Production ◽  
Conventional Method ◽  
Artificial Insemination ◽  
High Production

The study aimed (1) to verify if artificial insemination (AI), performed in the morning, evening or nighttimehas influence on the pregnancy rate on high production dairy cows, and (2) to determine the repeat breedingrate after the AI at intervals of 01-21, 22-43 and 44-65 days. We analyzed 1980 AI data from HolsteinFriesian cows from years 2004 to 2008. The average milk production on this period was 39 kg/milk/day/cow (305 days of lactation). The AI was performed 12 hours after the first detection of estrus. For the dataanalysis one AI was computed. The AI was done based on conventional method. The incidence of the AI in themorning, evening and night was 29.8; 50.4 and 19.8% respectively; and the pregnancy rate 45.7; 44.9 and48.4%. The frequency of the repeat breeding rate at the interval of 1-21 days on morning, evening and nightafter failed AI was 28.0; 22.3 and 19.8% respectively; at the interval of 22-43 days was 52.0; 52.2 and 55.2%,respectively and at interval of 44-65 days was respectively 20.0; 25.5 and 25.0%. Comparing the three timesof the day each other, the cows showed greater repeat breeding on 22-43 days (P<0.05) after the AI. It wasconcluded that times of the day has no influence on the on pregnancy rate; the highest repeat breeding ratetook place between 22 and 43 days after AI, resulting significant delaying of the open period.

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