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.
At the end of the second trimester, your baby will be almost four times as big as it was at the end of the first trimester. It's a good time to invest in maternity wear, and spread the good news of your pregnancy with your friends and family.