[Incidence of hypertension in pregnancy in relation to the definition of hypertension].

According to a proposal of the International Society for the Study of Hypertension in Pregnancy (ISSHP) the definition of hypertension is based on a diastolic blood pressure of 90 mmHg or more. Systolic and mean arterial blood pressure (e.g. MAP II) are not be taken into account. Out of a clear defined district the totality of n = 2259 pregnant women has been strictly supervised till to delivery and afterwards. The frequency of hypertension according to the old ACOG-definition was calculated to be 15.9% (n = 360). According to the newer ISSHP-definition it was 12.7% (n = 287). To detect severe and hazardous cases the newer ISSHP-definition seems to be better than the older definition of ACOG. Therefore, the acceptance of the ISSHP-proposal is recommended.