That Jīva (living being), which is born through uterine birth;
it is born in the womb of the mother as a result of the union of the semen and ovum (blood), which ultimatly results in the formation of zygote.
yovisadyonāvaikadhyamāgaty a grahanam śukraraktayoryat kriyate jīvena jananyabhyavahrtāhārarasapariposāpeksam tadgarbhajanmocyate.
(TaVā 2.32 Vṛ)