ok so Sloane is worken on this Rambaldi thing,
and we know it has a heart, and we know sloane has it.
we also know that rambaldi depicked Sydney in his writings.
so like sloane made this Rambaldi thing, say it is a man of some sort.
and say the 'man' thing has Rambaldi's little soldiers in it.
so it impregnates sydney, then durring birht she has to have a sea section, thuse the scar.
then after nursing the child for a year or so, here memory is cleared and he is droped.
done and done, that how see got the scar.