Pregnancy health centre
Third trimester
Third trimester
How baby develops during months seven, eight and nine.
View week-by-week images of your third trimester of pregnancy.
Tests and milestones of third trimester
Women who are pregnant often experience sleepless nights and daytime fatigue in their first and third trimesters.
Third trimester discomforts
Women who are pregnant often experience sleepless nights and daytime fatigue in their first and third trimesters.
Some women develop a condition known as pelvic girdle pain (PGP) during pregnancy.
Sciatica causes pain or numbness and tingling that radiates from the lower back down the buttock and into the leg and foot.
Backaches in pregnancy may be due to strain on back muscles, changing hormone levels and changes to posture.
Haemorrhoids or piles appear because of increased circulation and pressure from the growing baby.
Heartburn and indigestion are common in pregnancy because of hormone changes and the pressure of a growing baby in the abdomen.
Leg cramps are common, often from around the 27th week of pregnancy.
Pressure from the growing baby can cause fluid retention and swelling in the legs and feet.
Changes in pregnancy and a growing baby may cause varicose veins.
Close to term
Around one in every 13 babies is born prematurely, before the 37th week of pregnancy.
Most babies – around 80% - arrive late.


