Garbh Sanskar is an ancient Indian practice of engaging in activities that boost the development of the fetus. Some of the best activities you can engage in during these times are meditation, yoga, listening to soothing music, reading, offering prayers, etc. You can download a Garbh Sanskar app to begin activities that will help you prepare mentally and physically for the beautiful journey.
Source - Garbh Sanskar: The Practice of Nurturing Your Unborn Child