in her sleep when her body is relaxed. Similarly the glowing radiant skin of pregnant women which most people have witnessed is due to the enhanced jing. After giving birth it is not surprising that many mothers suffer from postnatal depression as they suddenly lose the large amount of jing that was in their belly.
There are two types of kundalini which both come from lower dimensions. These are Earth Kundalini and Body Kundalini.
Earth Kundalini comes from the core of the earth which is actually a large iron crystal. This crystal is like an interdimensional gateway which goes into a lower dimension. This dimension contains the kundalini force which is infinite and is the ultimate nurturing force of all material creation. This force travels upwards from the iron core crystal and enters the human body at the perineum, the location of the Base Chakra. When the Base Chakra is activated and all associated issues have been cleared it becomes possible for this force to enter the body and travel straight up through the middle of the body and out the top of the head. It passes through all the chakras on its way through and fully activates them.
If the Base Chakra is blocked and not properly activated, the kundalini will not be activated at the iron core crystal and will not connect with the Base Chakra located at the perineum. The Base Chakra and the iron core crystal work together and some esoteric schools actually say that the core crystal is the true location of the base chakra. From my perspective the base chakra and the iron core crystal are distinct structures although they do operate in unison while incarnated on Earth. The Earth Kundalini remains almost entirely dormant for most humans as it is cut off from us when we are still very young. The formation of the earthly ego and personality, the many emotional blockages and sexual issues and the reactivation of past life traumas stop the flow of the kundalini at a young age.