From Tommy's:
There are a few here that probably affect you..
"Weight exercises to avoid in pregnancy
Cross-fit type training, which involves lifting heavy weights in a timed circuit. If you have lots of experience of doing cross-fit, you may be able to carry on with some changes to your routine and support from your doctor.
General circuit classes using bar bells and fast movements.
Exercises that use heavy bar bells behind your neck after 12 weeks. You could use dumbbells instead.
Using a single, large barbell to do deadlifts, clean and press, and upright rows, especially in the third trimester. There is a risk of the bar hitting your bump.
Weighted sit-up exercises after 12 weeks.
Abdominal rotation machines.
Lifting weights while lying on your back after the first 12 weeks of pregnancy.Instead, try the chest press and chest fly on an incline bench from 12 weeks and with a further incline from 20 weeks.
Lifting weights over your head after the first 12 weeks of pregnancy as it may strain your lower back.
Lying flat on your back after the first 12 weeks of pregnancy.
Bending at the waist after the first 12 weeks as it may make you feel dizzy."