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.
By 12 weeks and the end of the first trimester the baby is about 3 inches long and can move and even make a fist. It is around 12 weeks that the sexual organs show, and when an ultrasound can reveal if your baby is a boy or girl. The second trimester lasts from week 13 of pregnancy to about week 28.