How long do working mothers take maternity leave?

Calling all working mothers! First pregnancy here so I'm new to all of this. My job offers 1 week of maternity leave. Obviously more for the duration of employment but I'm eligible for only 1 week. So that plus my vacation time I get a total of 1 mth paid leave. I also have 40 hrs PTO but figured I'd save that for Dr. visits & etc. I really can't afford to take FMLA because I need a steady income and it's my income alone. I know 3 months is the ideal leave, but has anyone done less? Can 1 mth be enough?