Workout in first trimester.. Yoga?

Kat • Pregnant with baby #3
Just found out I was pregnant and I'm not quite at my goal weight I wanted to be at before I had baby number 2... So I figured working out throughout the pregnancy should help bounce back into shape! What workouts should I avoid. I had started doing yoga like handstands, side crows, headstands, etc. any of those safe during first trimester?