By
____________________
weeks'
gestational
age
,
the
____________________
(
ie
,
mesonephric
)
and
the
____________________
(
ie
,
paramesonephric
)
ducts
____________________
formed
from
intermediate
____________________
.
In
the
absence
of
testosterone
and
müllerian
inhibitory
substance
,
the
____________________
ducts
regress
and
the
paramesonephric
ducts
continue
____________________
form
the
female
reproductive
____________________
with
fusion
____________________
the
distal
portions
of
the
paramesonephric
ducts
to
give
rise
to
the
uterine
fundus
,
the
cervix
,
and
the
upper
____________________
.
These
____________________
changes
are
genetically
controlled
in
large
part
by
a
series
of
complex
transcriptional
signaling
pathways
including
Wnt
signaling
,
Hox
genes
,
and
many
others
.
In
a
female
fetus
,
the
wolffian
duct
disappears
except
for
nonfunctional
vestiges
.
The
müllerian
duct
is
lined
by
a
columnar
epithelium
.
This
includes
the
entire
cervix
and
upper
vagina
to
the
vaginal
____________________
(
ie
,
sinovaginal
bulb
)
.
Through
a
process
of
squamous
metaplasia
,
the
vagina
and
a
variable
portion
of
the
ectocervix
become
covered
with
____________________
epithelium
.
This
process
is
complete
by
the
fifth
month
of
____________________
.
