Hi I Am 34 Year House Wife And Pregnant. Since

Hi
I am 34 year house wife and pregnant. Since I had had blood pressure before conceive, doctor advised to go for color code doppler study of renal artery test and found that my right kidney is normal and properly functioning where as left kidney is small and contracted and functioning just the half of Right Kidney..
Is there any risk associated with the child birth and mother's health ?
Please advise how to maintain a healthy pregnancy and risk free child birth !