Is early menopause hereditary?

My mother went through menopause 2 years after giving birth to me, which would have made her 30. I'm concerned that I too will have the same issue. I am 23 years old now and engaged to be married next year. however, i do not intend to have children until later on and would like more than just one, but would like to continue my quest to become a practicing clinical psychologist. i thought the appropriate age to have a child would be around 26, 27... but then i would have to have children back to back and it might hinder my schooling. HELP!