Identify the incorrect statement regarding changes to the female reproductive system following ...

Identify the incorrect statement regarding changes to the female reproductive system following birth.
 
  a. By 2 weeks postpartum the uterus has descended into the pelvis and returned to a non-pregnant size of approximately 6080 g.
  b. Postpartum, the vagina is initially oedematous, lacking in tone and lacking in rugae.
  c. Restoration of the vaginal epithelium may be impaired by perineal trauma due to episiotomy or lacerations.
  d. Increased production of proteoglycans and collagen help to restore the structure of the cervix.