The dobutamine stress echo test involves the injection of a medication called dobutamine while you are closely monitored. The medication stimulates your heart in a similar way as exercise. Important: If you have a pacemaker/defibrillator, it must be checked at Cleveland Clinic before your dobutamine stress echo test.
Your Baby During the Second Trimester. The second trimester is normally considered to be from the beginning of the fourth month to the end of the sixth month. This works out in weeks to start from about the thirteenth week of pregnancy.
Physical changes: Unfortunately the physical changes in the third trimester can sound like a laundry list of aches and pains; the good news is that you're in the home stretch! The third trimester begins at 28 weeks and ends with the birth of the baby.