Final answer:
Postpartum depression is the rare but severe mental disorder related to childbirth, which can occasionally be linked to rare cases of violence.
Step-by-step explanation:
The mental disorder that is rare but severe, believed to be linked to childbirth, and occasionally implicated in violence is A) Postpartum depression. Postpartum depression is a complex mix of physical, emotional, and behavioral changes that happen in some women after giving birth.
It is a form of major depression that begins within 4 weeks after childbirth. The symptoms can range from mild to severe depression and may include feelings of sadness, anxiety, or exhaustion that can significantly impede daily functioning.
It is distinct from mood swings known as 'baby blues,' which are normal and resolve within two weeks. Postpartum depression, when untreated, can last for months or longer and at its most severe, it may lead to dangerous outcomes, including violence, although this is rare.