S.S.
Hi S.,
I looked this up for you and I think you should really take a look at it first before you do anything. I worked out my whole pregnancy, but I worked out even before. I know there are guidelines you really need to follow with any exercise while pregnant, especially your heart rate. Please take some time with this site, it will help with questions you have and it will be from professionals. Your baby is most important and worth the reading. Congratulations on your pregnancy and the best of luck. Please email me and let me know what you think, and if you have any other questions. Best of luck with your pregnancy and run. S.
http://www.acog.org/publications/patient_education/bp119.cfm