The extensive application of AI in domestic animals is demanding an efficient technique
with high rate of success. Methods of improving the success of AI are subsequently
emanating from continuous research in the areas of procuring the best quality semen that
also require employing a rigours semen evaluation system. This book was prepared with an
intention of creating a useful addition to an already available literature on different aspects
Tuyển tập các báo cáo nghiên cứu về bệnh học thý y được đăng trên tạp chí Acta Veterinaria Scandinavica cung cấp cho các bạn kiến thức về bệnh thú y đề tài: Fixed-time artificial insemination in beef cattle...
Tuyển tập các báo cáo nghiên cứu về sinh học được đăng trên tạp chí sinh học Journal of Biology đề tài: Expected efficiency of selection for growth in a French beef cattle breeding scheme. I. Multistage selection
of bulls used in artificial insemination
By playing a role in the near-annihilation of a species, Theodore Roosevelt,
the president of the United States at the turn of the twentieth century, unwittingly
laid the groundwork for the most dramatic triumph yet in the use
of artificial insemination (AI) to rescue a species from extinction.
In the early 1900s, waves of immigrants from Europe settled in the
American Midwest. As humans transformed the land, they declared war
on a perceived pest: the prairie dog.
Crossbreeding work in Ethiopia was initiated in the early 1950s. Following this initiation
a number of governmental (example, Ethiopian Agricultural Research Organization,
Ministry of Agriculture, National Artificial Insemination Center, Higher Learning Institutes)
and non-governmental organizations (International Livestock Research Institute and
Swedish International Development Agency) have worked in the development of the
This book contains four parts with 16 chapters. Firstly, an optimal stimulation scheme
for ovaries, particularly natural and minimal stimulation of ovaries, has been
discussed in the first part. Then, one paper analyzed that how many oocytes per
retrieval will be the best for human IVF practice. If one stimulation scheme produces
too many eggs, it often results in hyperstimulation syndrome.
It is said that farms having land to grow crops and forage (PK-3 and PK-10R) were relatively most
competitive. The PK-10R farm is said to be most viable farm size, and has the potential of challenging
competitors in export markets6. Such farms make effective use of technological advances in breeding
practices, e.g., artificial insemination, to improve their herd quality. Some of them have also installed their
own pasteurization or processing equipment. However, there are only 23% of farmers who fall in the
PK-10R category, whereas 70% of the farmers have less than four animals.
In the kidney, the Th2-mediated response is characterized by formation of immune
complexes and deposition in the glomerulus, which is usually followed by complement
activation. On the other hand, the Th1-mediated response is characterized by infiltration of
circulating mononuclear cells and crescent formation. Both responses are capable of
releasing mediators that are responsible for functional and structural changes as seen in
primary glomerular diseases.
The Artificial Insemination Database Application for Asia (AIDA Asia) was
developed by FAO/IAEA in Microsoft Access 2000® and Visual Basic for Applications
. The computer application contains 6 files to record, analyse and report data on farms,
females inseminated, semen, oestrus characteristics, inseminators and pregnancy diagnosis.
Fourteen bulls comprising 7 zebus and 7 crossbreds (50% zebu and 50% Friesian) that
were used in the national AI programme were selected to determine their fertility.
By the close of official activities, the project had already contributed notably towards
increasing the productivity of livestock in the RCA countries, largely by increasing the
production of milk and meat. This, in turn, enhanced the incomes of the participating farmers.
In addition, due to the establishment of close coordination between this project, national
projects and coordinated research programmes, several laboratories have received
complementary assistance for upgrading their facilities and for consolidating their
experimentation capabilities in the field.
Because the ART industry is largely unregulated, we have very little data on who uses these
technologies. Until 2003, the only national data collected was through the Fertility Clinic
Success Rate and Certification Act of 1992, which requires that fertility clinics report the number
of pregnancies and live births from ART, which the Act defines narrowly as “fertility treatments
in which both eggs and sperm are handled in the laboratory” (e.g.
Most of the South Asian and Pacific countries have similarities in setting the policy
and execution of dairy and beef cattle genetic improvement programmes. Historically,
governments have played a major role in cattle farming and breeding activities; nowadays,
however, the initiatives of the private sector or of non-government organizations are
modifying the needs of farmers for support from the government. About 90% of the
contribution of the livestock sector is from small holders and this proportion is highly
consistent across countries.