Page 265 - كتاب تمريض نسا الاكتروني

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1- Involution of the uterus:-

 Involution is the rapid decrease in the size of the uterus as it returns

to the non-pregnant state and the breast feed may experience a more

rapid involution.

 After delivery, the weight of the uterus is 1000 grams, and its length is

20cm. By the end of 6 weeks, it is 50 grams weights and 7.5cm length.

 The fundus or uterine involution is usually midline and approximately

at the level of the woman's umbilicus (belly button) after delivery(6-

12hrs).

 Within 12 hours of delivery, the fundus may be (1 cm) above the
umbilicus.

 After this, the level of the fundus descends approximately 1

fingerbreadth each day, until by the 10th to the 14th day, it has

descended into the pelvic cavity and can no longer be palpated and must

be firm on palpation.

 It's return to near its non- pregnant size by 4 to 6 postpartum weeks.

 Uterine involution is due to autolysis of the excess of the muscle fibers.
Old blood vessels thrombose, and newer vessels develop within the

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