____________________
begins
in
the
____________________
,
where
a
____________________
fertilizes
an
____________________
.
If
the
sperm
carries
an
X
chromosome
,
the
____________________
will
become
____________________
,
while
a
Y
chromosome
will
result
in
the
baby
becoming
____________________
.
fertilized
egg
,
or
____________________
,
divides
repeatedly
as
it
travels
through
the
____________________
tube
,
implanting
itself
on
the
____________________
wall
to
form
both
the
____________________
and
a
specialized
organ
known
as
the
placenta
.
The
____________________
will
manage
waste
and
provide
____________________
,
____________________
,
and
hormones
via
the
____________________
cord
.
