There are numerous practices in the tibetan tradition relating the extraction of vital essence (bcud len) in medical practice

there are numerous practices in the tibetan tradition relating the extraction of vital essence (bcud len) in medical practice in the rin chen gter mdzod there are a number of gter ma texts concerning bcud len:

1) 'od ldan rtag ngu'i bcud len (rgya ban rdo rje dbang phyug)

2) dbang lag bcud len (kun spangs zla 'od)

3) gter kha bdun pa bcud len cong zhi ma (gu ru chos dbang)

4) shug 'bru'i bcud len gzhung zhal shes (gu ru chos dbang)

5) dgongs pa zang thal gyi bdud rtsi cong zhi'i bcud len (byang gter)

6) seng gdong dkar mo'i shu dag dkar po'i bcud len (mkhyen brtse'i dbang po)

7) rlung gi bcud len (grub chen dza ha bI ra)

8) rlung gi bcud len bka' babs dang po ('bri gung rin chen phun tshogs)

9) rlung gi bcud len bka' babs bar pa ('jam dbyangs mkhyen brtse'i dbang phyug)

10) rlung gi bcud len bka' babs phyi ma zab chos 'od pung rang grol (nyi zla klong gsal)

Source

[[1]]