セクションアウトライン

    • When environmental and physiological factors are arranged, the “gonadotropin-releasing hormone” is produced from the hypothalamus, and the “gonadotropin” is produced from the pituitary gland. “Gonadotropin” acts on the cell layer that surrounds the oocyte (follicular cell layer), producing sex steroid hormone and maturation-inducing hormone, which promotes egg growth and egg maturation, leading to egg laying.



      As shown above, various hormones are involved. If sexual maturation and spawning do not occur, hormones are artificially administered depending on the stage of maturation that is stopped. This is called artificial maturation.