Chloe Brown, Staff Midwife, The Portland Hospital
The overall answer is that it is safe, for both the mother and the foetus, to continue to work and exercise during a normal, low risk pregnancy. In fact, in most cases there are associated benefits to actually starting light exercise, if not done so already.
A general guidance is to continue with your usual sport and level of fitness. If you are starting out for the first time in pregnancy, use light exercise, as to not get too short of breath. The only sports which are suggested to be avoided are scuba diving or any activity where there is a risk of loss of balance and trauma, including contact sports such as rugby and carrying very heavy objects. This is in part due to the hormones of pregnancy, which soften the ligaments and add a risk of injury.
Exercise in pregnancy can be a great way to meet new mothers, reduce risk of pregnancy complications and add enjoyment to your pregnancy. Always, listen to your body, if you feel you are doing too much, you probably are. Enjoy!