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directly into immature egg cells with tissues that had been cryopreserved for more than four months.

Freezing sperm itself to preserve it for future use is only possible for boys who have reached puberty, so scientists have been seeking ways of helping prepubescent boys have a chance of producing their own children even after cancer treatment.

After thawing, the tissues were cultured or grown in a lab dish and spermatogenesis induced. The scientists found the thawed tissues was able to produce sperm just as efficiently as comparable unfrozen sperm tissue.

The team then used micro insemination where sperm is deposited Converse Shoes Ct Slim Ox White Leather

In a study published in the journal Nature Communications on Tuesday, Japanese researchers said their experiments using mice led to eight healthy offspring being born from sperm produced by previously frozen and thawed testicle tissue.

Takehiko Ogawa of Japan's Yokohama City University Association of Medical Science, wrote in the study.

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In this latest experiment, they cryopreserved the testicular Converse All Star Shoes Green tissues of newborn mice, either by slow freezing or vitrification a specialised fast freezing technique.

Infertility is one of the adverse side effects of certain types of cancer treatment, and, as cure rates for childhood cancers are increasing, fertility has become an important concern for patients and their families.

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This lead to eight offspring in total, they said, and the offspring grew healthily and were also able to reproduce.

"The cryopreservation of testicle tissue may be a realistic measure for preserving fertility," the team, led by Womens White Leather Converse Shoes

"This strategy presents a potential method for preservation of fertility but will require further work before it can be translated into humans," Ogawa's team wrote.

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´╗┐Frozen testicle tissue used to make mice babies

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LONDON Scientists have for the first time produced live offspring from testicle tissue that has been cryopreserved, or deep frozen, and say a similar technique might one day be used to preserve the fertility of boys facing cancer Converse Chuck Taylor All Star Specialty Ox Shoes - White


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Ogawa and colleagues said they had previously developed an organ culture system that can induce complete spermatogenesis the process by which sperm is produced by the testes in mice.

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