Quick & Easy Prenatal Morning Yoga Routine (20-min) For All 3 Trimesters. This is a 20 minute Prenatal Morning Yoga Routine to help you wake-up and go. Safe and Appropriate for all 3 trimesters. If you’re feeling stiff and in need of some stretching of the areas that need to be stretched. Also good to start up your heart and keep the blood pumping. This pregnancy yoga sequence will make you feel refreshed and great so that you’re ready for the day ahead!