begins after the delivery of the placenta and last approx. 6 weeks
What is involution?
uterus returns to its normal size through a gradual process
three retrogressive processes:
Contraction of muscle fivers to reduce those previously stretched during pregnancy
Catabolism, which reduces enlarged, individual myometrial cells
Regeneration of uterine epithelium from the lower layer of the decidua after the upper layers have been sloughed off and shed during lochial discharge
Approx. weight of uterus after birth?
1000 g soon after birth
500 g (shrinks by 50%) 1 week after birth
60 g at end of 6 weeks
What does lochia consist of immediately after childbirth?
mainly of blood, fibrinous products, decidual cells, and red and white blood cells
color is bright red
average amount of discharge is 240 to 270 ml (8 to 9 oz)
Three stages of lochia:
deep red mixture of mucus, tissue debris, and blood that occurs for the first 3 to 4 days after birth
pinksh brown in color and is expelled 3 to 10 day postpartum. contains leukocytes, decidual tissue, red blood cells, and serous fluid
creamy white or light brown and consists of leukocytes, decidual tissue, and reduced fluid content. occurs from days 10 to 14 but can last 3 to 6 weeks postpartum in some women and still be considered normal