Acinonyx, I am well aware what empathy means thanks but perhaps you don't.
I have one child out of choice. The family I have is the one I always wanted, hoped for and dreamed of having. So you see, I have never for one single second experienced any negative "pangs" of any sort about it; be they motivated by guilt, jealously, envy, inadequacy or whatever.
It is for that very reason that I can't empathise with anyone who has experienced those feelings.
I can sympathise with them for sure, but not empathise.
You see, empathy is about having the ability to imagine oneself in another's place and understand the other's feelings. Personally, I can't imagine having those feelings so can't empathise.
Empathy is a much deeper sense of emotion and a sense that you can feel another's feelings and state of being along with feeling sympathetic to their issue.
Sympathy on the other hand is the act or power of sharing the feelings of another; a feeling or an expression of pity or sorrow for the distress of another; compassion or commiseration.
This might illustrate the difference for you:
Sympathy: I am sorry for your loss. What can I do to help you during this difficult time?
Empathy: I feel and understand the pain of your loss; my grandmother passed away last year as well.
IMHO you can only empathise with someoe when you can honestly imagine having the feelings they do yourself (or have actually experienced them yourself too) and so can relate to them on a personal level.