Problem: A client with bipolar disorder has been taking lithium for the past year and now believes she may be pregnant. She is worried about the effects of lithium on her unborn child. Which responses indicate to the nurse that teaching about lithium and pregnancy were effective? Select all that apply. "Lithium does not cross the placental barrier and poses no risk to the fetus." "Lithium interferes with oral contraceptives and may cause a false-positive pregnancy test." "Lithium cannot be taken throughout pregnancy." "Lithium should be avoided during first trimester if possible." "I need to talk with my doctor about the risks and benefits of continuing lithium."