So no blood test would tell the whole story.
Right now, doctors may diagnose postpartum depression either because a woman complains of symptoms, or through a screening questionnaire. Yonkers said experts differ on whether new mothers should be routinely screened; the American Academy of Pediatrics, for example, says pediatricians should screen moms for depression during newborn checkups.
Other groups, including the American College of Obstetricians and Gynecologists, do not advise routine screening, but say doctors and women should consider it.
Learn more about postpartum depression from the American Psychological Association.
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