This is something I deal with thinking about as it comes up now and again, and upsets me. We don't have the closest of relationships now as adults.
She left me when I was 6 weeks old to go back to uni, leaving me with a close family member. I totally see it makes sense to finish your year at uni. Then however, during the uni summer holidays for the next two years, she went overseas to stay with cousins for six weeks.
I suppose I just wonder why she didn't want to be with her baby/ small toddler daughter even in the holidays. Is it probable that the whole reason is a lack of mother & baby bonding?