Hi Vall Erija. Congratulations of your pregnancy! The HIIT afterburn program is a high impact program. I would highly recommend consulting with your physician before you undertake this program. Based on your particular pregnancy, he/she should be able to guide you on what types of exercises you can or should be doing at this time.
We do have a low impact prenatal program that you may want to look into. Again, though, you may want to consult with your doctor first.