Shea M C
J Med Ethics. 1985 Dec;11(4):205-9. doi: 10.1136/jme.11.4.205.
A new human life comes into being not when there is mere cellular life in a human embryo, but when the newly developing body organs and systems begin to function as a whole, the author argues. This is symmetrical with the dealth of an existing human life, which occurs when its organs and systems have permanently ceased to function as a whole. Thus a new human life cannot begin until the development of a functioning brain which has begun to co-ordinate and organise the activities of the body as a whole.
作者认为,新的人类生命并非在人类胚胎仅有细胞生命时就已形成,而是在新发育的身体器官和系统开始作为一个整体发挥功能时才形成。这与现有人类生命的死亡是对称的,现有人类生命的死亡发生在其器官和系统永久停止作为一个整体发挥功能之时。因此,在发育出一个开始协调和组织身体整体活动的功能性大脑之前,新的人类生命无法开始。