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.
Less than 12 weeks or in the first trimester, the uterus is still hidden inside the pubic bone. While the fact that the uterus stays low until the second trimester, there is no exact time when the abdomen will start showing pregnancy. It depends on your body type and how many pregnancies you have had.