Pregnancy stages

Keep track of your pregnancy by weeks, months and trimesters.

First trimester

• 1 month - 1 to 4 weeks
• 2 months - 5 to 8 weeks
• 3 months - 9 to 13 weeks

Second trimester

• 4 months- 14 to 17 weeks
• 5 months - 18 to 21 weeks
• 6 months - 22 to 36 weeks

Third trimester

• 7 months - 27 to 30 weeks
• 8 months - 31 to 35 weeks
• 9 months - 36 to 40 weeks

Pregnancy normally lasts about 40 weeks from the first day of your last period. You reach full term at 37 weeks. If your labour doesn’t start by the time you reach 42 weeks, you would then be overdue.

If you have any questions about your pregnancy, call Pregnancy, Birth and Baby to speak to a maternal child health nurse on 1800 882 436.