In John 3:5 Jesus tells Nicodemus that no one can enter the kingdom of God
unless he is born of water and the Spirit. In John 3:5 Jesus answered, “I
tell you the truth, no one can enter the kingdom of God unless he is born
of water and the Spirit.” In my opinion its pretty clear that what ever
born of water means one will not enter the kingdom of heaven unless one
does that.
Many people argue that born of water is referring to a natural birth, many
of those same people also argue that life begins at conception. So if born
of water is a natural birth and life begins at conception what happens to
babies that were aborted, or the mother died prior to giving birth?

First of all, I definitely do not agree with the claim that
“born of water” is a reference to “natural birth.” This idea is born of
those who do not want to accept that in John chapter three Jesus is
talking about being born again in baptism. What Jesus did not say is “one
must be born, first of water, then later of the spirit.” He did say one
must be born again, of water and spirit. The language implies that this
second birth is both a birth of water and of the Spirit. This is an
obvious prophetic reference to the statement of Peter in Acts 2:38,39 that
those who would respond to having put Jesus on the cross must be repent
and be baptized for forgiveness of sins and to receive the Holy Spirit
(thereby being born again). In the context of John chapter three, Jesus
makes it very clear that he is NOT talking about physical birth.

That being true, your question becomes moot. Nevertheless,
you do raise some theological questions, and I would like to address them
very briefly. The Bible does not declare the moment when life begins, but
biologically speaking, it begins at conception. Perhaps a more
significant theological question is when the conceived but unborn child
receives a soul/spirit, becoming liable for eternal life. Is it at the
instant of conception, before a brain even begins to form? Is it at the
moment of actual birth? Is it at some point in-between? Again, the Bible
does not answer this question, so we are left to speculate. I prefer to
not speculate as I have no grounds on which to do so. What I will say is
that this is in God’s hands, and that he is a just God. Obviously, an
unborn child has not sinned and is not liable to judgment. Of course, I
am aware of the false doctrine of original sin, created by Augustine to
justify infant baptism. There is no biblical support for belief that
anyone is judged for the sins of anyone else, so I can only assume that if
an unborn child did have a soul and spirit, it would be accepted into the
arms of God, whether it was killed by an abortion or upon the death of its
mother.

John Oakes