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… 原始卵胞は分裂・増殖することができる⠀ ○ ×⠀ ⠀ (解答) ×⠀ まず、卵母細胞と卵胞の区別をしっかりしておいてください。卵母細胞がすなわち卵子です。卵母細胞が卵胞上皮細胞に包まれたものが卵胞です。⠀ 卵母細胞の起源は卵祖先細胞で、胎生期にさかんに分裂増殖しますが、出生前に卵祖細胞の分裂は止まり、一次減数分裂前期の状態で停止します。この状態の細胞を卵母細胞とよび、これ以降は増殖することはありません。この卵母細胞が一層の卵胞上皮細胞で包まれたものが原始卵胞で出生時にはおおよそ700万個あると言われます。⠀ ⠀ #解剖学 #生殖器系 #女性生殖器 #卵祖細胞 #oogonia #卵母細胞 #oocyte #卵胞 #ovarian_follicle ⠀ ⠀ 【一問一答】⠀ http://bit.ly/qanda62
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Infertility Treatment with Stem Cells is Unlikely
Infertility Treatment with Stem Cells is Unlikely
Because several laboratories have managed to differentiate embryonic stem cells into cells that look very much like human eggs and sperm, many have predicted that infertility will be treated with stem cell treatments (see Volarevic V, et al., Biomed Res Int. 2014;2014:507234). However, new work from the University of Gothenburg and Karolinska Institute has cast doubt on this hope.
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