Was Terri Horman suffering from post-partum depression?

The photo used in People magazine's coverage focusing on the Horman family. »Play Video
The family photo used in "People" magazine's coverage focusing on the stepmom, Terri Horman (center).

PORTLAND, Ore. – In an interview with ABC, Terri Horman's estranged husband Kaine has suggested this stepmother of missing 7-year-old Kyron Horman may have suffered from some form of post-partum depression.

Kaine called Terri Horman's emotional state "more erratic" after giving birth to their daughter 19 months ago

On Good Morning America Saturday, a psychiatrist talked about the differences between post-partum depression and post-partum psychosis.

Psychiatrist and author LouAnn Brizendine told GMA that post-partum depression comes with "crying, irritability, and fatigue and difficulty taking care of the baby or themselves because they're so sad..."

She said post-partum psychosis, on the other hand, is where "the mother actually loses touch with reality." Brizendine told GMA this type of psychosis is marked by bizarre thinking, strange ideas and "a complete personality change."

Investigators have not named Terri Horman as a suspect, or charged her with any crime.

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