Galen: De Uteri Dissectione (On the Anatomy of the Uterus)

τὸ ἐν τῷ ἀμνειῷ. τοῦτο δὲ καὶ πλέον ἐστὶ τοῦ ἑτέρου· καὶ γὰρ καὶ ὁ χιτὼν τοῦ χιτῶνος μείζων, εἴ γε ὁ μὲν ὅλον τὸ ἔμβρυον ἀμφιέννυσιν, ὁ δὲ κατά τινα μέρη ἐπίκειται αὐτῷ. ὅθεν δὲ καὶ τοῖς ὑγροῖς τούτοις ἡ γένεσις, καὶ τίς ἡ ἀπ’ αὐτῶν χρεία, ἐν τῷ ἐφεξῆς λόγῳ πάντα εἰρήσεται· καὶ τὰ περὶ τῶν ἀγγείων τῶν εἰς τὸ ἔμβρυον διὰ τοῦ ὀμφαλοῦ καθηκόντων αὐτὰ καθ’ αὑτὰ εἰρήσεται ἐν ἑτέρῳ λόγῳ τῷ περὶ τῆς τοῦ ἐμβρύου ἀνατομῆς.