The Chinese call of these Qi. Ki, BTW, is the Japanese term, as for example in Aikido (a martial arts with energetic aspects) or Reiki.

Though to my knowledge the Chinese would not necessarily agree of the associations between the energies as given above. For example, Post-Birth Qi is associated with food and water, stuff we take in every day and convert into usable energy, associated with the Middle Tantien, fire and heat. Pre-Birth Qi is associated with what we are born with, which is possibly our hormonal configuration and metabolism and its energies, associated with the Lower Tantien, water and cool.

All these things are energies, and whether you look at them from the perspective of what organs they influence, which qualities they have, what emotions they can produce (for example through Five Element Theory), they are just an expression of the same energy.

Oliver