I believe until 6 months after baby is born
You can develop ppd up to a full year after baby is born. If you think you're suffering, call your Dr office and get in to see your Dr where you can talk about it with someone. They'll help you set up a treatment plan, whether it be some at home thing you can do, therapy, or medication.
Good luck! I hope you feel better(:
Iwent thru it after ihad my 1st xtremely bad ): lasted maybe up til a yr .