Is human birth reincarnation?
The parents provide the gross physical body for the pleasure and pain of the subtle body of a Jiva. Brahma Sutra Bhasya of Sankaracharya 3.1.27 says,
From the womb a (new) body is born.
It is only when the soul (Atman and the subtle body) reaches the womb from candraloka that it gets, according to its residual Karma, a body for the enjoyments of pleasure and pain. In previous stages, it only gets connected with ether, air etc (during its journey from candraloka to the womb after the exhaustion of its karma).
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