On wikia, about bleeding
For every bleeding wound a unit is suffering from, they will lose 5 HP
every turn. For example. if a soldier is suffering from two bleeding
wounds, they will lose 10 HP every turn. Every time a soldier is hit
by a weapon, there is a flat 20% chance that they will suffer from a
bleeding wound, neither armour nor cover mitigates this percentage
chance.
All bleeding wounds can be healed with a Medipack, at least 5 HP must
be healed for the bleeding wound to be healed.
And about Soldier Recovery
Once the battle is over, a calculation is preformed on all dead
soldiers to determine if they survived their wounds or not. In order
for a soldier to be eligible for this the following conditions must be
met.
Their body must have been recovered, this happens either if the
Xenonauts win the battle, or the corpse is on the dropship when the
mission is aborted. They must not have suffered below -20 health
damage. So if a Soldier with 40hp was hit by a plasma bolt that dealt
70 damage, this would reduce their damage to -30, meaning they are
truly dead and have no chance of recovering. The calculation to
determine if a soldier survives is: chance = B + C * HP
B represents the soldiers base percentage chance of recovery, which by
default is 50. C represents how much the percentage value will
decrease for every point of health below 0, by default this number is
set to 2.5.
Therefore, in your case, she will be incapacitated with -4 hp.
The chance is 50 - 2.5%*4 = 40% she will survive.