First of all, we human beings will never run out of semen. Secondly, he will never store it by himself, because he can continue to secrete it. The oldest semen in the world has been stored for about 50 years. 1968, a laboratory of the University of Sydney used sperm freezing technology to freeze the sperm of four Merino sheep. So far, these sperm are the oldest living sperm of all species in the world. Recently, a team of animal reproduction experts from the University of Sydney successfully fertilized 50-year-old frozen sperm and 56 ewes in vitro, of which about 34 cases were successfully conceived, with a pregnancy rate of 6 1%.

This is almost the same as the pregnancy rate of 59% sperm frozen for only one year, which also shows the feasibility of long-term frozen sperm. The University of Sydney also shared a photo of an original sperm donor named Freddie, who was born in 1959. As an important means of assisted reproductive technology, sperm freezing technology has been successfully applied to animal medicine and human medicine. I believe everyone is familiar with it. However, sperm frozen for 50 years can still maintain considerable vitality and fertility, and great progress has been made in the field of reproduction.

Sperm cryopreservation technology refers to the special treatment and preservation of semen in ultra-low temperature environment, so that sperm activity can be preserved for a long time and the purpose of maintaining male fertility can be achieved. The biggest advantage of frozen semen is that it can be preserved for a long time, so the use of semen is not limited by time, region and the life span of male animals, and the stability of cell genetic shape can be maintained. The earliest offspring of frozen semen in the world are calves born in 195 1 year.

It was quickly applied to clinical medicine. The first baby to freeze human sperm was born in 1953. Since then, assisted reproductive technology has mushroomed, so don't make a fuss about the above issues. We humans are the smartest human bodies. As long as we are given time, we can study unexpected things.