If you have a healthy pregnancy, you basically can continue training until birth. In fact, it's even advisable to keep exercising and maintain your fitness level. However your body will change dramatically over time, so adjusting your sports activity and intensity is vital. Do not force anything and listen to signals from your body during and after training. When experiencing pelvic pain or extreme fatigue, it is better to reduce intensity and take it a little easier. It is also advisable to take part in sports activities under professional supervision so that you know exactly what you can and can not do. In addition, you should discuss your sports plans with your midwife or gynecologist before you start.