Venerable Mary of Agreda's: Mystical City of God - (whose body remains Incorrupt) states that Our Lady received her soul after 7 days and that men get theirs after 40 days and women after 80 days.
She speaks of the rational soul - not sure if it's the same thing as the immortal soul or not.............
219. The day on which the first Conception of the
body of the most holy Mary happened, was a Sunday,
corresponding to the day of the week on which the an
gels were created, whose exalted Queen and Lady She
was to be. For the formation and growth of other
human bodies, according to the natural order, many
days are necessary in order to organize and fit them for
the reception of the rational soul. Thus for a manchild
are required forty and for females eighty days,
more or less, according to the natural heat and disposi
tion of the mothers. In the formation of the virginal
body of Mary the Almighty accelerated the natural time
and that, which according to the natural rule required
eighty days, was accomplished in Her within seven days.
Within these seven days, by accelerated growth, was
organized and prepared in the womb of holy Anne that
wonderful body which was to receive the most holy soul
of her Daughter and of our Lady and Queen.
220. On the Saturday next following this first Con
ception, the Almighty wrought the second Conception
by creating the soul of his Mother and infusing it into
the body; and thus entered into the world that pure
Creature, more holy, perfect and agreeable to His eyes
than all those He had created, or will create to the end
of the world, or through the eternities. God maintained
a mysterious correspondence in the execution of this
work with that of creating all the rest of the world in
seven days, as is related in the book of Genesis. Then
no doubt He rested in truth, according to the figurative
language of Scripture, since He has now created the
most perfect Creature of all, giving through it a be
ginning to the work of the divine Word and to the Re
demption of the human race. Thus was this day a
paschal feast for God and also for all creatures.
221. On account of this Immaculate Conception of
most holy Mary the holy Spirit has provided that Satur
day be consecrated to the Virgin in the holy Church,
since that was the day on which She received the great
est benefit through the creation of her soul and its
union with its body without entailing sin or its effects.
The day of the Immaculate Conception, which the Church
now celebrates, is not the day of her first conception,
when the body alone was conceived, but it is the day of
the second Conception or the infusion of her soul. Body
and soul, therefore, remained for nine months in the
womb of holy Anne, which are the days that intervene
between the Conception to the Nativity of that Queen.
During the other seven days preceding the vivification
of the inanimate body, it was disposed and organized by
the divine power, in order that this work might corre
spond with the account that Moses gives of the Creation
of all things, comprising the formation of the whole
world at its beginning. ........