Gu Qiang operated in accordance with the plan, and first made synchronized estrus.

Synchronous estrus is the use of certain exogenous hormones to artificially control the estrus cycle of a group of female animals, so as to organize embryo transfer within a predetermined time.

There are many drugs that can be used for exogenous hormones, and the control effect is strong or weak, and the efficiency is high or low, but it is not very rare. What Yang Rui discussed with Professor Wang Yong that day was the existing exogenous hormones-it is easier to use the ready-made natural than to re-develop them, not to mention the non-critical part of the mature drugs.

Of the two hundred Simmental cows at the scene, 186 of them entered the estrus stage. It is not easy to increase the success rate after calculating the success rate of over 90%.

The remaining 14 heads looked at their companions at a loss, wondering why they suddenly changed.

A young cow turned anxiously.

She was surrounded by cows that were already in heat, mooing, hunched, and irritable, and they looked different from usual.

This very young cow, after turning 20 or 25 laps, resolutely made a decision, only to see that she also arched her waist, and learned that other cows gave up the trough. Then he raised his hooves impatiently and turned his head to the bullpen where the bull was.

Finally, this heifer successfully attracted the attention of a veterinarian.

He put on his heavy rain boots again, took the utensils, and went up to check.

Gu Qiang also raised his head and asked, "In heat? Is that 187?"

Comrade Qin Yue, a veterinarian from China Animal Husbandry, watched in the herd for a while, took off his glasses and wiped it, and said, "No, it's still 186."

"Isn't it? It looks like it."

"It's pretended." Qin Yue put on his glasses and replied concisely.

The crowd around the bullpen let out a soft laugh.

Gu Qiang shook his head in astonishment.

He stays in the laboratory for a long time, but the time on the scene is short. However, this is the case for most researchers, and those who are sent to the site are often the least experienced members of the research team or project team, or assistant researchers, or doctoral students, or graduate students, and sometimes even undergraduates.

However, genetic engineering laboratories do not have low-age experimental dogs for exploitation.

In the genetic engineering laboratory, the person with the lowest seniority is Yang Rui, who has only three years of scientific research experience, which is almost the same as a general master’s degree graduate. In the research institute, it is equivalent to the qualifications of an assistant researcher-so Gu Qiang can only Go out in person.

Fortunately, the China Animal Husbandry Headquarters, for the sake of two hundred Simmental cattle, will fully allocate auxiliary manpower.

Only when Gu Qiang shouted "Superovulation started", there was a cowherd who brought the cows in heat one by one, first weighing them, and then taking notes.

Four Chinese animal husbandry veterinarians lined up to give the cows injections one by one.

Qin Yue is at the forefront, not only responsible for injections, but also for reporting numbers and judging the health of the cattle.

Gu Qiang stood behind the veterinarians, and according to the reported weight data, sucked up the gonadotropin into the needle, and then handed it to the veterinarians.

It was Yu Xing'an who helped Gu Qiang. He stared at the veterinarians to ensure that all the medicine in the needle was injected into the correct cow.

After the entire injection process was completed, Yu Xing'an poured a large amount of foamy water on the veterinarians in the name of disinfection.

Even if someone secretly squeezed some medicine on the body, the entire bucket of disinfectant would destroy the activity of the medicine.

Director Tie from Qingmu has been reporting on his duties in the capital for some time recently. Today, he also came here specially. Seeing this scene, he couldn't help but smile, and said to the arrogant Director Mei next to him: "Look, your pastoralists give money. No matter how much, it is still not trusted."

"There's no need to instigate a divorce, you are too tender to play this." The arrogant Director Mei has always despised the broad-shouldered and strong Director Tie's strategic ability.

Director Tie chuckled, and said, "You don't need to instigate discord. Look at it. There is only one gonadotropin. They are all hiding for fear that you will know it."

Director Mei also looked a little ugly, and said, "Maybe they have developed a special hormone. It is normal to prevent other units from knowing about it."

"Even if you can get five in one ovulation? I heard that the latest foreign technology, ovulation has six and seven gonadotropins, this thing is not used much, it is a big deal to buy it, you give it Is there too little money?" Director Tie doesn't care about the relationship between the Haidian District Genetic Engineering Laboratory and the China Animal Husbandry Headquarters. He now wants to respond to Comrade Lao Mei. Of course, if the relationship between the two parties goes bad, it would be even better. He dreamed of monopolizing this resource.

Director Mei has not dealt with Director Tie since he was in school, but he secretly agreed with what he said just now.

Director Mei twisted his neck uncomfortably and said, "Yang Rui is a young man after all. This genetic engineering laboratory in Haidian District is also a new laboratory. They have finally developed new technologies, even if only 60% of foreign products are available. Its effectiveness is also worthy of respect."

"Hey, people who work in Beijing are different. It's a bunch of bunches in Mandarin." Director Tie smiled twice, but shouted at the veterinarian in front: "Have you seen eggs? How many eggs? ?"

He asked, naturally how many ovulations are discharged.

Anyone who has studied junior high school biology knows that embryos come from the combination of a sperm and an egg. The number of sperm released by a bull at a time is extremely large, which can be described as tens of thousands, and the eggs are extremely scarce.

For a cow with only one fetus, the number of eggs in a cow is even less, often only three to four. In other words, the number of embryos available for embryo transfer is actually determined by the number of eggs.

If a cow ovulates 4 eggs at a time and all develop into a-grade embryos, then after one embryo division, it is possible to get 8 half embryos.

Even if the half-embryo transplantation success rate is 50%, for fine breed cattle, this is the breeding efficiency of doubling and then doubling, not to mention that multiple ovulations can be performed within a year.

However, commercial operations have always been unable to achieve ideal data, and the desire of capital is not enough to be satisfied with 4 times or 8 times efficiency.

In developed countries outside of China, the reason why biotechnology companies are tirelessly burning money to research embryo transfer technology is that they have improved the success rate in all aspects.

For example, in the process of embryo collection, the purpose of injecting gonadotropin is to obtain more than 4 eggs...

In an era when an egg basically represents a cow, it is inevitable to develop better and better gonadotropins.

From the 1970s to the 1980s, gonadotropins changed their poles, not only to get more eggs, but also to reduce side effects and increase the ratio of available embryos.

In this subdivision field, domestic research institutes have naturally fallen behind again. It should be said that there is basically no research, and the technology introduced in the 1950s and 1960s has been introduced and used in Eastern Europe.

However, the difference between five eggs and seven eggs is not a man, but two cows.

Veterinarian Qin Yue, stepping on rain boots and holding a notebook, walked over~lightnovelpub.net~ called "Director Mei" and "Director Iron", and then asked softly: "You call me?"

"I called you, Director Mei wants to know how many eggs are there in a cow?" Director Tie couldn't see any expression on his face, he was very serious.

"It's still not clear yet." Qin Yue looked at his notebook and hesitated.

"Just say you know." Director Tie has been on the ranch for a lifetime, leaving no room for words.

Qin Yue turned his face to Director Mei.

Director Mei gave a "hmm" and said, "Just ask, say as much as you know."

"Yes." Qin Yue looked down at the book and said: "We have checked twelve cows, and the corresponding ovulation numbers are 10, 12, 11, 10, 13, and 9. 12..."

"Wait, what you are asking is the number of eggs, how many are there in a cow?" Director Tie opened his eyes.

Qin Yue held up the frame and said, "I'm talking about a cow."