The following guidelines relate to normal, adult women who are, or have experienced a normal and healthy pregnancy or birth. In the majority of cases exercise is safe for both the mother and the baby, and at the correct intensity is not associated with complications or an adverse pregnancy outcome.
Pregnancy is divided into three periods (called trimesters):
1st Trimester (first 3 months) 1 – 12 weeks
This is the phase with the highest risk of miscarriage, and often the time when women suffer from morning sickness, but experience of this varies greatly.