The Tibetan Bodhisattva belongs to the Empress Bodhisattva who has become a Buddha. For Buddhists and Bodhisattvas, they made a big wish to benefit and protect all sentient beings in the mortal land. After obtaining the holy position, they continued to bless their names by practicing six degrees of ten thousand lines, making them the best treasure for the benefit of all sentient beings, so that those who read the names can satisfy all the wishes of Buddhism, including the desire to protect pregnant women and fetuses.
Therefore, as long as you recite the name of the Bodhisattva devoutly, you will be able to protect the fetus.