Kammabhava Paccaya Jati definition
Kammabhava Paccaya Jati means due to physical, verbal and mental activities, Jati (rebirth consciousness) arises. Be it whatever Jati, the beginning of Patisandhi Vinnana (birth consciousness). The Buddha said, "Jatipi Dukkha". It means Jati is Dukkha Sacca whether it is Jati of Man, Deva or Brahma. It is for the Yogi to decide at this juncture whether it is worth while to wish and long for the Jati in the next existence. When Jati is begotten what are its implications? What will be the eventual prize? The answer is "Jati paccaya Jara Marana". It is obvious that because of Jati, Jara and Marana are begotten or in other words Jati is inevitably followed by old age and death.
Kammabhava Paccaya Jati means Jati arises depending on Kammabhava. "Jati Paccaya Jara Marana Soka Parideva Dukkha Domanassa Upayasa Sambhavanti" means because of Jati there arises old age, death, sorrow, lamentation, pain, grief and despair. Thus the train of Paticcasamuppada evolves or in other words this is the evolutionary process of a single train of Paticcasamuppada which is nothing but the arising and disappearing of Khandhas and these very Khandhas are nothing but Dukkha itself or the whole train or series of Dukkha.