• Go to the "More" menu in the bottom bar
  • Select “Change my due date/weeks pregnant" (in the "ACCOUNT" section)
  • Edit your estimated due date, weeks pregnant, last menstrual period, or date of conception and tap "Done"
  • Select "Update my due date"
  • Tap "Save" in the top right corner
All four fields in the due date calculator (estimated due date, weeks pregnant, last menstrual period, and date of conception) are connected and take into account 38 weeks of gestation and approximately 2 weeks from your last period until ovulation.