More likely to happen with first baby or if subsequent baby with a new partner.
Symptoms are high blood pressure, so 140/90 and above consistently with protein in urine. Symptoms are headache not settling with paracetamol, visual disturbances, significant suddenly onset of swelling particularly to face, pain under ribs, nausea or vomiting. Other things could be reduced fetal movement and bleeding.
A change in blood pressure during pregnancy is normal and hospitals should not be using the old guidance of so many numbers above booking BP. Blood pressure is always or should be always lower at booking due to haemodilution.
Baby is more likely to be small due to poor blood flow in placenta.
Increased risk of PET is raised BMI, prev PET, renal problems, pre existing high blood pressure, first baby, new partner.
Risks of small baby, placental abruption, still birth, preterm labour, renal failure, liver failure, stroke, HELLP syndrome.
Pregnancy should be closely monitored, this may be is an inpatient or outpatient.