Which are the most effective analgesics for pain relief from uterine cramping/involution following vaginal birth?
Only 9 of the included studies (with 750 women) reporting 24 comparisons of analgesia with other analgesia or placebo had data that could be included in the meta-analyses. The majority of analyses in this review included only 1 study with small numbers of participants. The average year of the included studies was 1981.
Women may experience cramping pain and discomfort following the birth of their baby as the uterus contracts and returns to its pre-pregnancy size. These after-birth pains are caused by involutionary contractions and usually last for 2 to 3 days after childbirth. They are more evident for women who have previously had a baby. Breastfeeding stimulates the uterus to contract and increases the severity of after-birth pains.