Add punctuation: Here are some of the most common symptoms of a chemical pregnancy that you can watch out for
A: Here are some of the most common symptoms of a chemical pregnancy that you can watch out for:

Add punctuation: The speed with which a galaxy was moving toward or away from us was relatively easy to measure due to the Doppler shift of their light
A: The speed with which a galaxy was moving toward or away from us was relatively easy to measure due to the Doppler shift of their light.

Add punctuation: It is manufactured by the Swedish company Ama Laser Systems AB
A:
It is manufactured by the Swedish company Ama Laser Systems AB.