Being consultant led, having high blood pressure and low birth weight don’t all equal an early birth. It can happen ofcourse but unless a mother and baby are in a life and death position they won’t bring that birth any forward than 37 weeks. That’s full term. Granted she may have pre-eclampsia but controlled she could be okay, my sister had it and her child was born 40 weeks normal birth. It sounds like she’s being monitored so I’m sure all will be fine, she’s just being told what could happen, not will happen.