Preeclampsia, Toxemia, PIH, PET refer to serious, closely related hypertensive conditions of pregnancy.

Toxemia is an older term based on a belief that the condition was the result of toxins (poisons) in the blood.

Preeclamptic toxaemia "PET" is a term used by older physicians in the UK.

Pregnancy Induced Hypertension 'PIH'. A newer term

The Preeclampsia is a term used as an umbrella to cover all variants of hypertensive disorders of pregnancy.