New Fathers Show the Same Brain Pruning as First-Time Mothers (scientificamerican.com)
A 2014 study found heterosexual fathers, mothers, and gay primary-caregiver fathers all changed in the same "parental caregiving network." Paternal postnatal distress often surfaces as anger, irritability, or substance misuse rather than sadness — and arrives later than the maternal onset.
On the thread, men described the change without the lab language: one ex-forensics worker, long desensitized to abuse footage, found that after his child arrived he simply could no longer look.
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