Embryo transfer

Japanese: 受精卵移植 - じゅせいらんいしょく（英語表記）embryo transfer

The transfer of a fertilized egg into a surrogate mother. In the field of livestock, it is synonymous with embryo transfer. The early stage when a fertilized egg begins cleavage (cell division) is called an embryo. A capable female, such as a cow, is given hormone treatment to induce superovulation, and a large number of fertilized eggs are obtained through artificial insemination. These are then transferred to the female surrogate mother to obtain offspring. A similar technique is in vitro fertilization, in which unfertilized eggs are removed from the ovaries of a capable female, matured in a test tube, fertilized with sperm, and transferred to a surrogate mother. Using these techniques, a large number of offspring can be obtained from a single mother.

(Kawaguchi Hiroaki, science journalist / Kikuchi Masako, science journalist / 2007)

Source : "Chiezo" published by Asahi Shimbun Publications Co., Ltd. About Chiezo

Japanese:

受精卵を代理母に移植すること。畜産の分野では、胚移植と同義語。受精卵が卵割(細胞分裂)を開始した初期の段階を胚という。ウシなどの優秀な雌に、ホルモン処置を行い過剰排卵を起こさせ、人工授精によって多数の受精卵を得て、これらを代理母となる雌に移植し、子を得る。類似する手法に、体外受精があり、これは優秀な雌の卵巣から未受精卵を取り出し、試験管内で成熟させた後、精子と受精させ、代理母に移植する。これらの手法により1頭の母親から、多数の子が得られる。

(川口啓明科学ジャーナリスト／菊地昌子科学ジャーナリスト／ 2007年)

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