____________________
is
the
time
from
fertilization
to
birth
.
The
time
from
fertilization
to
birth
usually
last
____________________
weeks
.
____________________
takes
place
in
one
of
the
fallopian
tubes
.
A
sperm
cell
fuses
with
an
ovum
to
form
a
____________________
.
Cells
divide
to
form
a
ball
called
a
____________________
.
When
the
ball
of
cells
reaches
the
____________________
it
attaches
itself
to
the
wall
of
the
uterus
.
In
the
uterus
,
the
____________________
develops
.
When
all
the
organs
are
formed
,
the
form
is
called
the
____________________
.
The
foetus
grows
in
the
____________________
____________________
,
which
protects
it
.
The
amniotic
sac
is
filled
with
____________________
____________________
.
The
foetus
is
attached
to
the
mother
by
the
____________________
____________________
.
The
____________________
____________________
is
the
remains
of
the
umbilical
cord
.
The
____________________
provides
nutrients
and
oxygen
,
and
removes
waste
products
.
