To birthmoms from a man - why is it painful to give up your baby for adoption?

Thank you all for your replies - I had no intention of offending anyone.Giving your baby up for open adoption if you are unable to parent, seemed like a no-brainer to me. After all, it's not abortion.However, I wondered; is the mother-child bonding aka 'maternal instinct' due to hormones, or something else? From HS Biology, if I remember correctly, the Lutenizing Hormone is responsible for production of breast milk and the mother-child bonding. In animals this is temporary but from your experiences, in humans this seems to be much longer.If it is so painful and traumatic and if the child was so precious, then how come we read about or know of so many cases where the parents kill, molest, prostitute, sell, abandon their own children?Just look at the local news - it is too painful to read of these incidents sometimes.