(17) At the time of the offense, the defendant was suffering from post-partum depression or post-partum psychosis which was either undiagnosed or untreated, or both, and this temporary mental illness tended to excuse or justify the defendant's criminal conduct and the defendant has been diagnosed as suffering from post-partum depression or post-partum psychosis, or both, by a qualified medical person and the diagnoses or testimony, or both, was not used at trial. In this paragraph (17):
"Post-partum depression" means a mood disorder which strikes many women during and after pregnancy which usually occurs during pregnancy and up to 12 months after delivery. This depression can include anxiety disorders.
"Post-partum psychosis" means an extreme form of post-partum depression which can occur during pregnancy and up to 12 months after delivery. This can include losing touch with reality, distorted thinking, delusions, auditory and visual hallucinations, paranoia, hyperactivity and rapid speech, or mania.