Commercial Embryo Transfer
Nearly all commercial embryo transfer done now use nonsurgical recovery rather than surgical techniques, as there is less hassle and less danger, in terms of bleeding, infection, etc.
1. Choosing the donor cow The first step in the procedure is to select the donor cow. This is the cow whose genes will be passed down to the next generation(s). Therefore, it is important to choose the cows with best genes, whether it is for beef, so the cow that grows the largest and/or largest, or for dairy, so the cow that produces the most milk. She should be kept at the level of nutrition appropriate for her size and level of milk production. The cow should not be obese or overly thin, as both health problems cause reduction in fertility.
This cow should …show more content…
Because of this, it is recommended to inseminate the cow multiple times during and after heat. Usually, it is beneficial to inseminate the super ovulated cow at 12, 24 and 36 hours after the onset of standing heat. It is essential to use quality semen with a high percentage of motile cells, to boost the chance of having fertilised embryos. The correct placement for semen is in the body of the uterus, which is just ½ to 1 inch in front of the cervix. Placing the semen here improves the chance of …show more content…
Stage 4, 5 or 6 embryos endure the freezing and thawing procedures with the greatest viability. Grade 1 embryos are considered the only ones to freeze. Grade 2 embryos can be frozen and thawed, but rates are reduced.
6. Selection and Preparation of Recipient Females.
Cows that are reproductively sound, that show calving ease and have good milking/mothering ability, and have proper nutrition. To maximize embryo survival in the recipient female following transfer, conditions in the recipient tract should closely resemble those in the donor. This requires the synchronization of the oestrus cycle between the donor and recipients, at least one day of each other, if not closer. Prostaglandin products should be injected into the recipient and donor cow at the same time. These drugs are only effective on recipients that are already cycling.
7. Embryo
1. Choosing the donor cow The first step in the procedure is to select the donor cow. This is the cow whose genes will be passed down to the next generation(s). Therefore, it is important to choose the cows with best genes, whether it is for beef, so the cow that grows the largest and/or largest, or for dairy, so the cow that produces the most milk. She should be kept at the level of nutrition appropriate for her size and level of milk production. The cow should not be obese or overly thin, as both health problems cause reduction in fertility.
This cow should …show more content…
Because of this, it is recommended to inseminate the cow multiple times during and after heat. Usually, it is beneficial to inseminate the super ovulated cow at 12, 24 and 36 hours after the onset of standing heat. It is essential to use quality semen with a high percentage of motile cells, to boost the chance of having fertilised embryos. The correct placement for semen is in the body of the uterus, which is just ½ to 1 inch in front of the cervix. Placing the semen here improves the chance of …show more content…
Stage 4, 5 or 6 embryos endure the freezing and thawing procedures with the greatest viability. Grade 1 embryos are considered the only ones to freeze. Grade 2 embryos can be frozen and thawed, but rates are reduced.
6. Selection and Preparation of Recipient Females.
Cows that are reproductively sound, that show calving ease and have good milking/mothering ability, and have proper nutrition. To maximize embryo survival in the recipient female following transfer, conditions in the recipient tract should closely resemble those in the donor. This requires the synchronization of the oestrus cycle between the donor and recipients, at least one day of each other, if not closer. Prostaglandin products should be injected into the recipient and donor cow at the same time. These drugs are only effective on recipients that are already cycling.
7. Embryo