Whoever developed this concept of kundalini awakening during pregnancy is an ignorant of the highest order. Kundalini awakening is not something practiced while in family way.
Kundalini awakening is required by people like Mahavira, Gautama Buddha even Jesus Christ and Prophet Mohammed. People of the level of Swami Vivekananda indulged in kundalini awakening.
Kundalini awakening is a process that finally results in full activation of brain. Before one indulged in kundalini awakening our brain was active 1 to 2%. After full kundalini awakening our brain becomes 100% active. This is the state of enlightenment attained by Mahavira, Gautama Buddha, Jesus Christ and Prophet Mohammed.
If our goal of life is spiritual, we desire reaching God in our lifetime then only we must indulge in kundalini awakening. I know many people world over who started their pursuit of God wholeheartedly but finally quit midway. Their kundalini awakened partially only to become serious patients of depression. People in family way must never attempt such things.
Kundalini directly relates to path of spirituality detailed in Bhagavad Gita. If we do not want to indulge in teachings of Lord Krishna in Bhagavad Gita then kundalini awakening was not for us.
Whoever preached otherwise was limited by commercial aspirations. Acting wisely logically we must take a firm decision in the matter. I again repeat kundalini awakening is meant for the spiritual traveler only, never otherwise.