A textbook of obstetrics . Ei Afp K Fig- 53-—Section through part of amammalian ovary: A/Y, Germinal epitheli-um ; PS, an egg-cord; I, U, primitive ova;G, investing cells; A, germinal vesicle;.V, follicular cavity arising in one of theolder follicles; Lf, follicular cavity, moreenlarged ; Ei, nearly mature ovum, whichhas developed around it the zona pellucida, J/// Mg, membrana granulosa; D,I >i-< us proligerus; So, ovarian stroma;Tf, capsule ol follicle; g,gt blood vessels;u, immature Graafian follicle (alter Wiidersheim |. OVULATION, 6l The Discharge of the Ovum from the Ovary and its
A textbook of obstetrics . Ei Afp K Fig- 53-—Section through part of amammalian ovary: A/Y, Germinal epitheli-um ; PS, an egg-cord; I, U, primitive ova;G, investing cells; A, germinal vesicle;.V, follicular cavity arising in one of theolder follicles; Lf, follicular cavity, moreenlarged ; Ei, nearly mature ovum, whichhas developed around it the zona pellucida, J/// Mg, membrana granulosa; D,I >i-< us proligerus; So, ovarian stroma;Tf, capsule ol follicle; g,gt blood vessels;u, immature Graafian follicle (alter Wiidersheim |. OVULATION, 6l The Discharge of the Ovum from the Ovary and its Migra-tion to the Uterine Cavity.—()va arc discharged from the ovaryfrom puberty until the menopause,—that is to say, on the average,from the fourteenth to the forty-fifth year. Ovulation, however,. Fig. 54.—Formation of polar bodies in ova of Asterias glacialis: ps, Polarspinale ; pb, first polar body; pb,/J second polar body; n, nucleus returning tocondition of rest (Hertwig . may begin before menstruation, may cease before the menopause,or possibly may continue after it. A young girl has been im-pregnated as early as the ninth year. In the child-marriages of
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Keywords: ., bookcentury1800, bookdecade1890, bookidtex, booksubjectobstetrics
