which insulins cant be taken when pregnant?

hi, i'm currently planning a pregnancy with my partner & have heard that some insulins 'arent safe' to take while pregnant. what are these insulins? i'm on novorapid & levemir. i have an appointment with my diabetic consulatant & i'm going to tell them of our plans to start a family. i'd just like a rough idea of what to expect e.g them changing my insulin

thankyou hana