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.
The second trimester of pregnancy begins at 13 weeks. Between 13 and 15 weeks, the four lobes of the cerebral cortex have developed.7 The face continues to mature: the nasal plugs disappear,8 fat deposits fill out the cheeks9 and tooth development begins.10.