Second Trimester Checklist Ah, the second trimester of pregnancy is often referred to as the honeymoon stage. It is a time when the morning sickness and fatigue of the first trimester becomes a vague memory and it is a time before the excessive weight gain makes you feel miserable. Maternity clothing fits good, you have energy, and you just feel good overall. *Exercise. Just because you’re pregnant doesn’t mean you should stop the physical activity. Quite the contrary. Doing exercises helps to build the stamina needed to get through the third trimester and birth. Ask your health care provider what types of activities are safe for you to do during this time. Yoga, walking, and swimming are all excellent and safe exercises to do. You’ll find that exercising will also help you to have a good night’s rest too. Here is an article on relation and pregnancy exercises. *Tests. The second trimester is a time when the majority of testing is done. At this point, the baby is big enough to see..