Garbha Upanishad is one of the 108
Upanishads and is from the Krishna Yajur Veda. It explains in detail the processes from the conception of a child in the womb to its birth. Garbha means womb, and there is mention about each stage of development of the fetus.
This Upanishad expounds the details of what human consciousness goes through, while it still resides in the womb, in the form of a fetus. The soul trapped within the maternal womb, goes through a state of emotional turmoil, remembering past births and deaths.
Garbha Upanishad states that the fetus before birth promises God not to repeat evil deeds but during the process of birth, a force called the ‘Vaishnava Prana’ touches him, and he forgets his thoughts and prayers. This entails repeating the process of learning and seeking the ultimate truth once again in the life granted.