Scientists give birth to male rats in “useless” experiment
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Scientists in Shanghai, China have successfully fertilized male rats in a controversial new experiment. Animal testing has raised concerns about ethics and cruelty to animals.
In the study, researchers sewn castrated male and female rats together by knees, elbows, and skin. By doing this, the animals were able to share the blood.
The study included 46 pairs of Siamese rats.
The testosterone levels of the male rats had “significantly decreased” within six weeks, Nature wrote. Meanwhile, their estrogen and progesterone levels were similar to those of female rats.
The researchers transplanted a uterus into the male rats eight weeks after the surgery. Eight weeks later, they also transplanted embryos.
Scientists delivered the puppies by Caesarean section. Of the 280 embryos implanted in male rats, 3.68 percent survived to adulthood – 10 pups in total.
“No social value”
Qiu Renzong is a bioethicist at the Chinese Academy of Social Sciences in Beijing. According to China daily, Renzong was the first to introduce bioethics to China over 40 years ago.
“The experience has no social value and only wastes taxpayer money,” he said. Nature.
The study’s authors wrote that their research could have “a profound impact on reproductive biology.”
But in contrast, study co-author Rongjia Zhang said the research was conducted “for our personal interests and curiosity.”
“Please stop associating the rat model with humans. They are completely different, ”he said.
“Male pregnancy in men is not feasible at this stage,” Zhang wrote on PubPeer. “If our result is correct, it is almost a death sentence for a human male pregnancy.”
PETA’s senior science policy advisor Emily McIvor called the experience “disgusting.”
“Animals should not be produced in the laboratory, experimented with or treated as disposable objects; they deserve to be respected and left alone, ”she told Online Mail.