A complete handbook of midwifery for midwives and nurses / by J.K. Watson.

  • Watson, J. K. (James Kenneth), 1929-
Date:
[1914]
Catalogue details

Licence: In copyright

Credit: A complete handbook of midwifery for midwives and nurses / by J.K. Watson. Source: Wellcome Collection.

    48/384 (page 28)
    That part of the decidua vera where the ovum becomes attached and where the placenta afterwards is to form is called the decidua serotina (late decidua). The presence of the ovum acts as an irritant to the spot where it lodges and active growth takes place here insomuch that the Fig. 17.—The Deciduae at an Early Stage of Pregnancy. a, Decidua reflexa; b, Anterior uterine wall ; c, Decidua serotina ; ,i, Posterior uterine wall ; e, Decidua vera. folds of the decidua vera by which it is surrounded grow forward from each side around the ovum until they meet in the middle. These folds of the decidua vera which grow up around the ovum constitute the decidua reflexa.