After her daughter was born, Rae Jacobson was hit by a bout of severe postpartum depression. Back then, there wasn’t much out there about ADHD and women, let alone ADHD and postpartum mental health. Rae had heard that there was a link between ADHD and postpartum depression. But with a tiny baby to care for and a life to navigate, she had more pressing things to deal with.  But the question kept bugging her: Does ADHD make you more likely to have postpartum depression? This week on “Hyperfocus,” Rae finally gets some answers to questions she has had for years. Her guest is Dr. Catherine Birndorf, a reproductive psychiatrist, co-founder of “The Motherhood Center,” and an expert on postpartum mood disorders.