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Full-Text Articles in Medicine and Health Sciences
Efficiency Of Heat Reduction In Barns During Rainy Season And Barn Characteristics: Their Relationship To Reproductive Performance Of Dairy Cows In A Tropical Environment, Watcharapong Choonkham, Thuwanon Boonkerd, Siriporn Kanwichai, Peter Vos, Witaya Suriyasathaporn
Efficiency Of Heat Reduction In Barns During Rainy Season And Barn Characteristics: Their Relationship To Reproductive Performance Of Dairy Cows In A Tropical Environment, Watcharapong Choonkham, Thuwanon Boonkerd, Siriporn Kanwichai, Peter Vos, Witaya Suriyasathaporn
The Thai Journal of Veterinary Medicine
The objectives of this study were toevaluate the impact of efficiency of heat reduction on barns during the rainy season and barn characteristics on the reproductive performance of dairy cows in a tropical environment. Data of cows from 125 small-holder dairy farms in Chiang Mai, Thailand, during May to August 2014 was used. Reproductive performance indices, e.g. days to first insemination (DI) and days open (DO), were used as dependent variables. Microclimate factors included differences in temperature (TEMP_DIFF) and relative humidity (RH_DIFF) between the inside and outside of barns. From the total of 5,255 lactation data, 27 and 1,398 data …
Advanced Biotechnologies For Wildlife Fertility Preservation, Pierre Comizzoli
Advanced Biotechnologies For Wildlife Fertility Preservation, Pierre Comizzoli
The Thai Journal of Veterinary Medicine
Reproductive biotechnologies are critical tools for saving and maintaining endangered species. Some successes have been reported with the use and integration of artificial insemination (with fresh or frozen-thawed semen) in conservation programs. However, not a single species is currently managed through oocyte freezing or embryo-based technologies. This is primarily due to the lack of knowledge of species biology, as well as inadequate facilities, space, expertise, and funding needed for their successful application. More fundamental studies of animal reproductive biology as well as more fertility preservation options are needed with all parties involved (reproductive technologists, zoo biologists and conservationists) adopting parallel …
Reproductive Effects Of Pg600 In Female Pigs, Narathon Innamma, Attaporn Roongsitthichai
Reproductive Effects Of Pg600 In Female Pigs, Narathon Innamma, Attaporn Roongsitthichai
The Thai Journal of Veterinary Medicine
PG600 is a synthetic gonadotropin comprising 400 IU equine chorionic gonadotropin (eCG) and 200 IU human chorionic gonadotropin (hCG). Major responsibilities of PG600 were to stimulate follicle growth and induce ovulation. In replacement gilts, a number of large follicles were found after PG600 treatment. Nevertheless, the number of good quality follicles was not different between treatment and control gilts. In primiparous sows, the number of those returning to estrus within 10 days after weaning from PG600 were higher than those in control group. In addition, the administration of PG600 enhanced the number of piglets born alive per litter in the …
Postparturient Administration Of Prostaglandin F2 Alpha Facilitates Weaning-To-Service Interval In Primiparous Sows, Atthaporn Roongsitthichai, Padet Tummaruk, Nutthee Am-In
Postparturient Administration Of Prostaglandin F2 Alpha Facilitates Weaning-To-Service Interval In Primiparous Sows, Atthaporn Roongsitthichai, Padet Tummaruk, Nutthee Am-In
The Thai Journal of Veterinary Medicine
The present study was conducted to investigate the effect of exogenous prostaglandin F2 alpha (PGF2α) administration on weaning-to-service interval (WSI) in primiparous sows. A total of 149 primiparous sows, 74 control and 75 treatment sows, were included in the study. The latter sows were intramuscularly injected with PGF2α approximately at 24-48 h after parturition. Results revealed that those treated with PGF2α returned to be in estrus significantly faster than those in the control group (2.6±1.1 vs 4.5±2.1 days, p<0.05), while age at first mating, pregnancy rate, and age at first farrowing were not different from each other. In conclusion, PGF2α could shorten WSI in the primiparous sows as it could induce complete luteolysis and promote uterine involution, resulting in declined non-productive days of the commercial breeding herds.
Importance Of Backfat Thickness To Reproductive Performance In Female Pigs, Atthaporn Roongsitthichai, Padet Tummaruk
Importance Of Backfat Thickness To Reproductive Performance In Female Pigs, Atthaporn Roongsitthichai, Padet Tummaruk
The Thai Journal of Veterinary Medicine
Backfat in pigs consists of water, collagen, and lipid. Apart from age, body weight, and number of estrus expression, backfat thickness is one of the significant parameters to consider when selecting female pigs into breeding herds since it dominates a number of reproductive performances, e.g. puberty attainment, total piglets born (TB), and farrowing rate. Besides, backfat is one of the significant sources of hormones related to puberty attainment, such as leptin, insulin-like growth factor-I (IGF-I), and progesterone (P4). Evaluation of backfat thickness is majorly performed by an A-mode ultrasonography at P2 position; it provides more accurate body condition than visual …
The Role Of Kisspeptin Signaling In Reproduction Of Ruminant, Thuchadaporn Chaikhun, Pongsiwa Sotthibandhu, Siriwat Suadsong
The Role Of Kisspeptin Signaling In Reproduction Of Ruminant, Thuchadaporn Chaikhun, Pongsiwa Sotthibandhu, Siriwat Suadsong
The Thai Journal of Veterinary Medicine
In the present decade, kisspeptin has been a fascinating topic in the reproductive spotlight. Kisspeptin is a neuropeptide, produced mainly in the hypothalamus from Kiss1 gene. This gene was initially discovered in 1996 as a tumor suppressor gene in human malignant melanoma. Then in the year 2003, researchers found that mutations of the G protein-coupled receptor (GPR54), which is the strongly cognate receptor of kisspeptin, were associated with hypogonadotropic hypogonadism in mice and humans. There are many kisspeptin distribution and function studies (both in vitro and in vivo) in mammals. In ruminants, kisspeptin has been studied mainly in sheep and …
Association Among Serum Insulin–Like Growth Factor–I, Backfat Thickness, And Age At First Observed Estrus In Gilts, Atthaporn Roongsitthichai, Seri Koonjaenak, Padet Tummaruk
Association Among Serum Insulin–Like Growth Factor–I, Backfat Thickness, And Age At First Observed Estrus In Gilts, Atthaporn Roongsitthichai, Seri Koonjaenak, Padet Tummaruk
The Thai Journal of Veterinary Medicine
The present study investigated the association among serum insulin-like growth factor-I (IGF-I), backfatthickness, and age at first observed estrus in replacement gilts. In total, 80 replacement gilt, Landrace (L, n = 48) andYorkshire (Y, n = 32), were included. The gilts were determined for age at first observed estrus between 167 to 212days of age. They were categorized according to age at first observed estrus into ≤ 200 days (n = 41) and > 200 days (n= 36) groups. Backfat thickness, body weight, and serum IGF–I concentration were measured before mating. Age atfirst mating, interval from boar exposure to first observed …
Reproductive And Dairy Performances Of Thai Swamp Buffaloes Under Intensive Farm Management, Thuchadaporn Chaikhun, Ranchuan Hengtrakunsin, Fabio De Rensis, Mongkol Techakumphu, Siriwat Suadsong
Reproductive And Dairy Performances Of Thai Swamp Buffaloes Under Intensive Farm Management, Thuchadaporn Chaikhun, Ranchuan Hengtrakunsin, Fabio De Rensis, Mongkol Techakumphu, Siriwat Suadsong
The Thai Journal of Veterinary Medicine
In this study the reproductive and dairy performances of swamp buffaloes under intensive farm conditions were evaluated. The data of reproduction and milk production were collected from forty-eight swamp buffaloes during the period of 2001 to 2010. The reproductive and dairy performances were analyzed as mean±SD of each index. The age at first calving was 47.1±8 months and the gestation period was 321.4±11.3 days. The service per conception was 3.5±2.5, with insemination by both natural and artificial mating. The calving interval and the days open were 486.2±75.02 and 166.2±69.7 days (n=99), respectively. Additionally, there was a large increase in primiparous …
Assisted Reproduction Techniques In Horses: The Challenge, Theerawat Tharasanit, Mongkol Techakumphu
Assisted Reproduction Techniques In Horses: The Challenge, Theerawat Tharasanit, Mongkol Techakumphu
The Thai Journal of Veterinary Medicine
Assisted reproduction techniques (ARTs), such as artificial insemination and embryo transfer are well established and have been used in a wide range of species. To date, the economic impact of these ARTs in horses has rapidly increased. While many studies have attempted to improve the efficiency of ARTs, overall success remains relatively restricted due principally to a limited knowledge of the unique reproductive physiology of this species. Improving efficiency of particular techniques has become an affordable milestone in the development of ARTs in equine reproduction.
The Effects Of Temperature And Relative Humidity On The Conception Rate Of Cattle In Smallholder Dairy Farms In Chiang Mai, Veerasak Punyapornwithaya, Sorn Teepatimakorn, Khwanchai Kreusukon, Witaya Suriyasathaporn
The Effects Of Temperature And Relative Humidity On The Conception Rate Of Cattle In Smallholder Dairy Farms In Chiang Mai, Veerasak Punyapornwithaya, Sorn Teepatimakorn, Khwanchai Kreusukon, Witaya Suriyasathaporn
The Thai Journal of Veterinary Medicine
The aim of this study was to determine the effects of temperature and humidity on the conception rate of Holstein crossbred dairy cows in smallholder farms in Chiang Mai, Thailand. 7,312 pregnancy diagnosis examinations on 3,166 dairy cows in 510 herds and artificially inseminated, were collected by Chiang Mai AI Research and Biotechnology Center. The monthly average weather data, including minimum and maximum of both temperature and humidity, were obtained from the Thai Meteorological Department for the months January 2001 to December 2002. The relationship between temperature, humidity and conception rates were analyses by using a generalized estimation equation. For …
Factors Influencing Puberty Attainment In Gilts And Policies That Can Improve Mating Efficiency In Replacement Gilts, Padet Tummaruk, Wichai Tantasuparuk, Mongkol Techakumphu, Annop Kunavongkrit
Factors Influencing Puberty Attainment In Gilts And Policies That Can Improve Mating Efficiency In Replacement Gilts, Padet Tummaruk, Wichai Tantasuparuk, Mongkol Techakumphu, Annop Kunavongkrit
The Thai Journal of Veterinary Medicine
The objective of this study is to review the information regarding the development of puberty in gilts and how it influences subsequent reproductive performance such an understanding can be used to improve mating efficiency in gilts. The percentage of gilts in a herd strongly influences overall productivity. The first management decision that has to be made about gilts entering the breeding herd, is the timing of the first breeding. This largely depends on when puberty develops. Puberty in gilts is defined as the time when the first oestrus and ovulation occurs followed by regular oestrous cycles. On average, gilts attain …