I think in some situations where parents have been neglectful in educating their children about safe sex or who have modeled risky behavior then yes, the parents have some degree of "blame" however ultimately, teens will do what they want no matter what you do and so for the majority of teen parents I would not blame the parents.
I don't know how my mum would have reacted... I think obviously she would have been very disappointed and I think she would have strongly encouraged a termination. That said, I don't think she would kick me out or disown me and I think once the baby arrived she would try to be supportive. She always did say though if I had a baby it would be my responsibility and she would not be raising it.
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