• V30 Single liveborn
  • V31 Twin birth mate liveborn
  • V32 Twin birth mate stillborn
  • V33 Twin birth unspecified whether mate liveborn or stillborn
  • V34 Other multiple birth (three or more) mates all liveborn
  • V35 Other multiple birth (three or more) mates all stillborn
  • V36 Other multiple birth (three or more) mates liveborn and stillborn
  • V37 Other multiple birth (three or more) unspecified whether mates liveborn or stillborn
  • V39 Liveborn unspecified whether single twin or multiple