Pregnancy in the context of pulmonary hypertension is characterised by high mortality for the mother and the foetus and is therefore strongly discouraged ; contraception has to be prescribed to patients in reproductive age. Women who decide to continue their pregnancy should be followed by multidisciplinary teams in specialised centres. A specific treatment should be defined with no delay. In case of clinical deterioration, the early, intravenous administration of prostacyclin should be considered. The ideal time and method of delivery are still disputed.