Will my hair grow back if I shave my head?

I was thinking about shaving my head but I heard that if I do, it will prevent my hair from growing back. Is this really true?

If your hair has significant miniaturization with hairs that are not growing at this time, then these hairs may not grow back if they are now growing now. Advanced miniaturization of the hairs is often the end stage of hair loss. Other parts of your scalp where there is not end stage miniaturization, will grow back normally.  Hairs in the early phase of miniaturization, grow slower than those hairs that are not miniaturized.