I think you are looking at reincarnation from a spiritual or reborn soul point of view , who know as anything is possible , but what if you look at it from another angle ,
we are made up of atoms and molecules and when someone dies their atoms and molecules disperse back into the grand scheme of things , now what if when someone is born and they start to grow and absorb some of the molecules that once belonged to a female , could it be possible that they can retain some sort of memory a connection to there past , maybe that is why some can experience their past life/lives .