Pregnancy lasts approximately 40 weeks and is calculated from the first day of your last period. Conception will probably not have taken place until around two weeks after this.

Pregnancy is divided into three parts known as trimesters.

  • First trimester – Weeks 1 to 13
  • Second trimesters  – Weeks 14 to 26, and
  • Third trimester – Week 27 until birth.

Back to Pregnancy Guide