A system of obstetrics . lli; b, blood-clotami decidua rerlexa; c, embryo. The youngest human ovum that has been seen was described byThomson,3 who estimated its age to be twelve to thirteen days. Theembryo in this case was 2 mm. long; the chorion was furnished withthin and simple villi ; the allantois was not to be detected ; and almost 1 Wyder : he. nt. 8 Edinb. Med. Journ., 1839, vol. lii. See preceding section. 204 THE FCETUS: ITS PHYSIOLOGY AND PATHOLOGY. the whole ovum was occupied by the yolk-sac. Other very younghuman ova have been described by Schroeder van der Kolk,1 Coste,2Hennig,3
A system of obstetrics . lli; b, blood-clotami decidua rerlexa; c, embryo. The youngest human ovum that has been seen was described byThomson,3 who estimated its age to be twelve to thirteen days. Theembryo in this case was 2 mm. long; the chorion was furnished withthin and simple villi ; the allantois was not to be detected ; and almost 1 Wyder : he. nt. 8 Edinb. Med. Journ., 1839, vol. lii. See preceding section. 204 THE FCETUS: ITS PHYSIOLOGY AND PATHOLOGY. the whole ovum was occupied by the yolk-sac. Other very younghuman ova have been described by Schroeder van der Kolk,1 Coste,2Hennig,3 Reichert,4 Breus,5 Beigel,6 Lowe,7 Kollmann,8 Ruge,8 has described a very interesting ovum, just four weeks(twenty-eight to thirty days) old, that measured 19 mm. in length, mm. in breadth (about the size of a pigeons egg), and grin. The length of the embryo, in a straight line from cephalicto caudal extremity, was 8 mm., while the actual length of the dorsalline was 20 mm. Fig. 149. Fig.
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectobstetrics, bookyear1
