scholarly journals The effect of oxytocin on the time of ovulation, conception, and embryonic survival in swine

1996 ◽  
Vol 76 (4) ◽  
pp. 541-545
Author(s):  
G. W. Dyck
Keyword(s):  
Key Words ◽  
Artificial Insemination ◽  
Subcutaneous Injection ◽  
Conception Rate ◽  
Transrectal Ultrasonography ◽  
Embryo Survival ◽  
Embryonic Survival ◽  
Key Words Oxytocin

Three experiments were undertaken to assess the effect of a subcutaneous injection of oxytocin (OT, 10 IU) on the time of ovulation in 25 sows, conception rate and embryo survival in these sows, and conception rate and embryo survival in 82 crossbred gilts. The OT was given after the sows were detected in estrus (exp. 1) and after the first artificial insemination (AI) in exps. 2 and 3. The effect of a single AI or a second AI 18 h later on embryo survival in the gilts also was assessed. The gilts were from either a control (C) line or a line selected (S) for minimum backfat at market weight. In sows, OT versus no injection (NI) had no effect on the time of ovulation, as determined by transrectal ultrasonography (TU) when the injection was given at the detection of estrus (OT, 43.4 ± 3.4 h; NI, 47.3 ± 4.1 h), or after the first AI (OT 43.6 ± 3.2 h; NI 40.5 ± 3.0 h). Oxytocin had no effect on embryo survival in sows (OT, 78.1 ± 4.0%; NI, 76.4 ± 4.0%) or gilts (OT, 79.4 ± 3.0%; NI, 83.2 ± 2.2%). The number of inseminations had no effect on embryo survival (single, 80.3 ± 2.6%; twice, 82.0 ± 2.7%). Embryo survival was lower in S gilts (77.1 ± 2.8% vs. C, 87.1 ± 1.5%, P = 0.0092). These results show that OT had no effect on the time of ovulation in sows or embryo survival in sows or gilts. In gilts embryo survival was not altered by a second AI. Embryo survival was reduced in gilts selected for minimum backfat. Key words: Oxytocin, artificial insemination, ovulation, embryo survival

scholarly journals Study on the effect of insemination time on pregnancy rate of Bangladeshi buffalo in intensive farming

2019 ◽  
Vol 16 (2) ◽  
pp. 143-152
Author(s):  
MA Hamid
Keyword(s):  
Pregnancy Rate ◽  
Artificial Insemination ◽  
Conception Rate ◽  
Transrectal Ultrasonography ◽  
Livestock Breeding ◽  
Intensive Farming ◽  
Rectal Palpation

The study was designed to evaluate the insemination time and pregnancy rate of Bangladeshi buffalo at Lal Teer Livestock Breeding and Research Farm, Bhaluka, Mymensingh, Bangladesh during January 2017 to June 2018. A total of 30 cyclic buffaloes were included in this study. The animals were inseminated under four different times, i.e. inseminated i) between 0-6 hours after seeing first sign of estrous, ii) between 6-12 hours after seeing first sign of estrous, iii) between 12-18 hours after seeing first sign of estrous and v) between 18-24 hours after seeing first sign of estrous. The pregnancies (positive or negative) were confirmed by rectal palpation and transrectal ultrasonography after 60 days of artificial insemination (AI). The total pregnant animals in this study were 40%. The highest pregnancy rate (60%) was observed in insemination between 12-18 hours after seeing first sign of estrous and the lowest pregnancy rate (0%) was observed in insemination between 0-6 hours after seeing first sign of estrous. The findings of the study suggest that, the conception rate of buffalo depend on the time of AI, detection of proper estrus symptoms and site of semen deposition. SAARC J. Agri., 16(2): 143-152 (2018)

scholarly journals Study on factors affecting the conception rate in Red Chittagong Cows

1970 ◽  
Vol 39 (1-2) ◽  
pp. 52-57 ◽  
Author(s):  
MMR Mufti ◽  
MK Alam ◽  
MS Sarker ◽  
ABMR Bostami ◽  
NG Das
Keyword(s):  
Key Words ◽  
Artificial Insemination ◽  
The Body ◽  
Conception Rate ◽  
Factors Affecting ◽  
Retained Placenta ◽  
Related Data ◽  
Conception Rates

The research was undertaken to identify the factors affecting the conception rate in Red Chittagong cows (RCC). A total of 130 questionnaires were filled up to collect the related data during artificial insemination (AI) and subsequently pregnancy diagnoses were done after three months of AI at five upazillas (Satkania, Chandanaish, Potia, Anwara and Raozan) in Chittagong district. Conception rate of heifers and cows delivered 1, 2, 3 and 4 calves were 64.52, 72.73, 64.86, 60 and 53.33%, respectively. Conception rates were 19.4% higher in 1st delivered cows than that of the older cows attained the 4th or more parities. Red Chittagong Cows producing 3 kg or more milk during AI period had lower conception rate than the low producing cows. The conception rates of RCC were higher when inseminated between 10 to >14 hours after onset of estrous and the value was 74.19%. The conception rates of RCC were higher at a thawing period of 10-12 seconds than 5-7 seconds and 15-17 seconds and varied significantly. The conception rate was 10.62% higher in RCC for semen deposited in the body of uterus than deposited at the middle of the cervix. The conception rate of RCC for normal, difficult calving, retained placenta, uterine infectious and cystic ovaries cows were 70.27, 50, 33.33, 25 and 0%, respectively and the overall conception rate of disordered cows were 31.57%. In this study, the overall conception rate of RCC was found in 63.85%. This figure can be improved by taking different measures like; insemination at observing clear mucus and 10.0-14.0 hours after the onset of estrous, thawing of straw at 37ºC for at least 10-12 seconds, heating of insemination devices, service at docile condition, placement of semen at the body of the uterus and avoid crossing of RCC with exotic blood to ensure protection from health disorder like difficult calving and retained placenta. Key words: Red Chittagong cows; Artificial insemination; Conception rate DOI: http://dx.doi.org/10.3329/bjas.v39i1-2.9676 Bang. J. Anim. Sci. 2010, 39(1&2): 52-57

scholarly journals Influence of estradiol on bovine trophectoderm and uterine gene transcripts around maternal recognition of pregnancy

2021 ◽  
Author(s):  
Emmalee J Northrop-Albrecht ◽  
Jerica J J Rich ◽  
Robert A Cushman ◽  
Runan Yao ◽  
Xijin Ge ◽  
...  
Keyword(s):  
Artificial Insemination ◽  
Mrna Level ◽  
Fixed Time ◽  
Beef Cows ◽  
Differentially Expressed ◽  
Differentially Expressed Proteins ◽  
Rt Pcr ◽  
Embryo Survival ◽  
Uterine Fluid ◽  
Gene Transcripts

Abstract Embryo survival and pregnancy success is increased among animals that exhibit estrus prior to fixed time artificial insemination (AI), but there are no differences in conceptus survival to d16. The objective of this study was to determine effects of preovulatory estradiol on uterine transcriptomes, select trophectoderm transcripts, and uterine luminal fluid (ULF) proteins. Beef cows/heifers were synchronized, artificially inseminated (d0), and grouped into either high (highE2) or low (lowE2) preovulatory estradiol. Uteri were flushed (d16); conceptuses and endometrial biopsies (n = 29) were collected. RNA sequencing was performed on endometrium. Real-Time PCR (RT-PCR) was performed on trophectoderm (TE; n = 21) RNA to measure relative abundance of IFNT, PTGS2, TM4SF1, C3, FGFR2, and GAPDH. Uterine fluid was analyzed using 2D LC–MS/MS based iTRAQ method. RT-PCR data were analyzed using the MIXED procedure in SAS. There were no differences in mRNA abundances in TE, but there were 432 differentially expressed genes (DEGs) (253 downregulated, 179 upregulated) in highE2/conceptus versus lowE2/conceptus groups. There were also 48 differentially expressed proteins (DEPs; 19 upregulated, 29 downregulated), 6 of these were differentially expressed (FDR < 0.10) at the mRNA level. Similar pathways for mRNA and proteins included: calcium signaling, protein kinase A signaling, and corticotropin releasing hormone (CRH) signaling. These differences in uterine function, may be preparing the conceptus for improved likelihood of survival after d16 among highE2 animals.

scholarly journals Influence of seasonality, timing of insemination and rectal temperature on conception rate of crossbred dairy cows

2016 ◽  
Vol 37 (1) ◽  
pp. 155 ◽  
Author(s):  
Fransérgio Rocha de Souza ◽  
Carla Cristian Campos ◽  
Natascha Almeida Marques da Silva ◽  
Ricarda Maria dos Santos
Keyword(s):  
Dairy Cows ◽  
Rectal Temperature ◽  
Artificial Insemination ◽  
Dairy Farm ◽  
Fixed Time ◽  
Conception Rate ◽  
Digital Thermometer ◽  
Pregnancy Diagnosis ◽  
Chi Squared

This study aimed to evaluate the effects of rectal temperature (RT) on conception rate (CR), as well as the effects of seasonality (spring-summer vs. autumn-winter) and timing of artificial insemination (AI) (morning vs. afternoon) on RT and CR in crossbred dairy cows (Holstein x Gyr). The experiment was conducted on a dairy farm in Centralina, MG, where 1,219 conventional and fixed-time inseminations were analyzed. The RT was measured immediately before AI using a digital thermometer. Pregnancy diagnosis was performed using ultrasonography between 28 and 60 days after AI. T The effects of seasonality and timing of AI on RT were analyzed with a Mann-Whitney U test and the effects of RT (above or below the average), seasonality and timing of AI on CR were analyzed with a Chi-squared test, both using the SAS program. The RT average was 39.4°C. Cows with RT ? 39.4°C had lower CR than cows with RT < 39.4°C (25.78% vs. 32.54%; P = 0.0096). During spring-summer, cows had higher RT (39.44°C ± 0.025 vs. 39.27°C ± 0.022; P < 0.0001) and lower CR (25.49% vs. 31.75%; P = 0.0146) compared with autumn-winter. Cows inseminated in the morning had lower RT (38.96°C ± 0.022 vs. 39.60°C ± 0.018; P < 0.0001) and higher CR (32.86% vs. 26.06%; P = 0.0102) than cows inseminated in the afternoon. In conclusion, crossbred dairy cows with rectal temperature equal to or greater than 39.4°C had lower conception rate. Moreover, rectal temperature and conception rate were affected by seasonality and insemination time.

scholarly journals Conception rate of artificially inseminated Holstein cows affected by cloudy vaginal mucus, under intense heat conditions

2015 ◽  
Vol 50 (6) ◽  
pp. 492-498 ◽  
Author(s):  
Miguel Mellado ◽  
Laura Maricela Lara ◽  
Francisco Gerardo Veliz ◽  
María Ángeles de Santiago ◽  
Leonel Avendaño-Reyes ◽  
...  
Keyword(s):  
Artificial Insemination ◽  
Study Data ◽  
Meteorological Conditions ◽  
High Ambient Temperature ◽  
Conception Rate ◽  
Holstein Cows ◽  
Mean Annual Temperature ◽  
Northern Mexico ◽  
Prevalence Estimates ◽  
Intense Heat

The objective of this work was to obtain prevalence estimates of cloudy vaginal mucus in artificially inseminated Holstein cows raised under intense heat, in order to assess the effect of meteorological conditions on its occurrence during estrus and to determine its effect on conception rate. In a first study, an association was established between the occurrence of cloudy vaginal mucus during estrus and the conception rate of inseminated cows (18,620 services), raised under intense heat (mean annual temperature of 22°C), at highly technified farms, in the arid region of northern Mexico. In a second study, data from these large dairy operations were used to assess the effect of meteorological conditions throughout the year on the occurrence of cloudy vaginal mucus during artificial insemination (76,899 estruses). The overall rate of estruses with cloudy vaginal mucus was 21.4% (16,470/76,899; 95% confidence interval = 21.1-21.7%). The conception rate of cows with clean vaginal mucus was higher than that of cows with abnormal mucus (30.6 vs. 22%). Prevalence of estruses with cloudy vaginal mucus was strongly dependent on high ambient temperature and markedly higher in May and June. Acceptable conception rates in high milk-yielding Holstein cows can only be obtained with cows showing clear and translucid mucus at artificial insemination.

THE ACCUMULATIVE EFFECT OF FINNSHEEP BREEDING IN CROSSBREEDING SCHEMES: REPRODUCTIVE PERFORMANCE

1988 ◽  
Vol 68 (1) ◽  
pp. 69-81 ◽  
Author(s):  
MOHAMED H. FAHMY ◽  
JACQUES J. DUFOUR
Keyword(s):  
Body Weight ◽  
Mortality Rate ◽  
Key Words ◽  
Litter Size ◽  
Reproductive Performance ◽  
Conception Rate ◽  
Ovulation Rate ◽  
Genetic Groups ◽  
Linear Regressions ◽  
Size At Birth

Reproductive performance and body weight were studied on 361 ewes, representing Finnsheep (F), DLS (a population of 1/2 Dorset, 1/4 Leicester, 1/4 Suffolk) and seven combinations ranging from 1/8 to 7/8 Finnsheep breeding. Conception rate in yearlings was 61.5% for DLS compared to 89.0% for F with the crosses being intermediate. Conception rate in older ewes was similar in the different genetic groups (avg. 94%). Ovulation rate and litter size at birth of DLS ewes were 1.72 and 1.44 lambs, which was less than half those of F ewes (3.51 and 2.86 lambs, respectively). Both traits increased progressively with an increase in F breeding in crosses and with advances in age. DLS ewes weaned 1.22 lambs compared to 2.03 lambs for F ewes and 1.84 lambs for 4/8 F ewes. The heaviest litters at weaning (31.7 kg) were raised by 4/8 F ewes, followed by 7/8 F (30.8 kg) while those raised by DLS ewes weighed 23.0 kg and F ewes 29.1 kg. Percentage of ova lost per ewe mated averaged 24% and ranged between 18% (DLS and 1/8 F) and 29% (6/8 F). About 3.6% of lambs were born dead and a further 13.8% died before weaning. Preweaning mortality rate was highest in F (22.9%) and lowest in 3/8 F (9.4%). Average kilograms of lambs weaned per ewe exposed was highest in 4/8 F (27.6 kg) followed by F (26.0 kg), whereas that of DLS was the lowest at 18.1 kg. The 4/8 F cross showed 25% heterosis in kg of lambs weaned per ewe exposed and 52.5% increase over DLS. Significant positive linear regressions were calculated for ovulation rate, litter size and preweaning mortality rate on proportion of Finnsheep breeding in crosses. The relation was quadratic for percent ova lost and lamb mortality at weaning. Yearling DLS females weighted 36 kg compared to 44 kg for F yearlings. However, at 5 yr of age DLS ewes weighed 62 kg, 5 kg heavier than F ewes. The heaviest ewes at all ages were the 4/8 F (45 kg at 1 yr, 65 kg at 5 yr). Key words: Reproduction, DLS sheep, Finnsheep, crossbreeding, heterosis, repeatabilities

scholarly journals The Relationship between Farmer Characteristic and Knowledge towards the Successfulness of Cattle Artificial Insemination (AI) in Aceh Besar District

2018 ◽  
Vol 3 (1) ◽  
pp. 35-40
Author(s):  
Julia Kardin ◽  
Dasrul Dasrul ◽  
Sugito Sugito ◽  
Nurliana Nurliana ◽  
Teuku Zahrial Helmi
Keyword(s):  
Direct Observation ◽  
Artificial Insemination ◽  
Conception Rate ◽  
Farmer Knowledge ◽  
Real Relationship ◽  
Relationship Of ◽  
The Relationship ◽  
General Guidance

The purpose of this research was to identify the relationship of characteristic and knowledge of farmers to the successful of artificial insemination (AI) in Aceh Besar Districts. The number of respondents is 93 people from twenty three districts in Aceh Besar, selected purposively as the sample of this research. The instruments used in this research are questionnaire and direct observation in the field, while the observed variables are: farmer characteristics, farmer knowledge and artificial insemination result. The results of this research revealed that the characteristics and knowledge of the farmers were good and showed a real relationship to the successfulness of AI in Aceh Besar Districts. The average service per conception (S / C) in Aceh Besar Districts during 2017 was 1.32 while the conception rate (CR) was 86.36%. The results were in accordance with the standard of general guidance of Upsus Siwab Year 2017.

scholarly journals PENGARUH KETEPATAN WAKTU INSEMINASI BUATAN TERHADAP TINGKAT KEBERHASILAN KEBUNTINGAN DI KECAMATAN GEDANGAN KABUPATEN MALANG JAWA TIMUR

2018 ◽  
Vol 5 (2) ◽  
pp. 58
Author(s):  
Enike Dwi Kusumawati ◽  
Syam Rahadi ◽  
Fendi Sudianata ◽  
Dyah Lestari Yulianti
Keyword(s):  
Artificial Insemination ◽  
Input Data ◽  
Conception Rate

Penelitian ini dilaksanakan di wilayah Dinas Peternakan dan Kesehatan Hewan Kabupaten Malang-Sub Dinas Unit Pelaksana Teknis IB Kecamatan Gedangan Kabupaten Malang Provinsi Jawa Timur. Kabupaten Malang sebagai salah satu sentra peternakan rakyat sangat bergantung pada teknik Inseminasi Buatan tersebut. Dengan teknik ini sangat dimungkinkan untuk menghasilkan keturunan sapi yang memiliki daging unggul dengan harga jual yang lebih tinggi daripada sapi lokal, keadaan ini pada akhirnya akan membantu peningkatan ekonomi peternak. Selama pelaksanaan penelitian, input data berupa hari pelaksanaan IB, waktu birahi sapi betina dan waktu pelaksanaan IB. Metode yang digunakan untuk mengevaluasi pelaksanaan IB ini menggunakan metode deskriptif. Hasil penelitian evaluasi pelaksanaan IB di Kecamatan Gedangan menunjukkan bahwa IB yang dilakukan pada awal birahi memiliki tingkat keberhasilan sebesar 51,3%, pelaksanaan IB pada rentang waktu pertengahan birahi memiliki tingkat keberhasilan 100%, sedangkan pada  tahap akhir birahi memiliki kemungkinan terjadinya konsepsi sebesar 30%. Setelah dilakukan analisa dan penghitungan presentase, maka angka keberhasilan IB di Kecamatan Gedangan adalah 57,37% dan angka ketidakberhasilan IB mencapai 42,63%. Kesimpulan dari penelitian ini bahwa terdapat pengaruh  ketepatan waktu IB terhadap tingkat keberhasilan kebuntingan di Kecamatan Gedangan  Kabupaten Malang. Faktor-faktor penentu keberhasilan IB dalam hubungannya dengan ketepatan waktu IB adalah: kelainan anatomi saluran reproduksi, kelainan ovulasi, sel telur yang abnormal, sperma yang abnormal, dan kesalahan pengelolaan reproduksi.Keywords: artificial insemination, conception rate, estrus, standing heat

scholarly journals CONCEPTION RATE DAN SERVICE PER CONCEPTION PADA SAPI BALI HASIL INSEMINASI BUATAN DI KABUPATEN SUMBAWA BARAT TAHUN 2017

2020 ◽  
Vol 8 (2) ◽  
pp. 159
Author(s):  
Asih Deskayanti ◽  
Trilas Sardjito ◽  
Agus Sunarso ◽  
Pudji Srianto ◽  
Tri Wahyu Suprayogi ◽  
...  
Keyword(s):  
Direct Observation ◽  
Artificial Insemination ◽  
Secondary Data ◽  
Data Retrieval ◽  
Conception Rate ◽  
Primary Data ◽  
Normal Value ◽  
Several Variables ◽  
Bali Cattle ◽  
The Government

The study was conducted to know Conception Rate and Service per Conception of  Bali cattle acceptors in west Sumbaw district. Data were collected fot the periode of January to September 2017 from inseminator in west Sumbawa district. The data were taken by primary and secondary data. Primary data retrieval is done by direct observation, which includes several variables, where the variable include the identitiy of the breeder, the cages, feeding, drinking and knowladge of breeders. The secondary data were obtained by recording of the officer insemination. All data was analyzed to find a percentage of Conception Rate and find number of Service per Conception (S/C) by analyzed descriptive of SPSS. Risults of this research showed that Conception Rate and Service per Conception’s average of Bali Cattle is 60 % and 1,7. The conculusion of this research showed that Conception Rate is lower than normal value and Service per Conception of Bali cattle in West Sumbawa district is better. This research was expected to be a reference for the next artificial insemination programmed by the government.

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