The ICD 11 Code 18 is a WHO Classified code for Pregnancy, childbirth or the puerperium
Definition: A group of conditions characterized as occurring during the period of time from conception to delivery (pregnancy), during labor and delivery (childbirth) or during the approximately six weeks after delivery during which the uterus returns to the original size (puerperium).
Coding Note: The codes included in this chapter are to be used for conditions related to or aggravated by the pregnancy, childbirth or by the puerperium (maternal causes or obstetric causes)
Exclusion:
Postpartum necrosis of pituitary gland
Obstetrical tetanus
Injury, poisoning or certain other consequences of external causes