Can we scientifically identify Low-risk subjects of Preeclampsia?

Not being high-risk does not necessarily mean one is low-risk. It is well known that amongst many parameters to identify potential subjects for developing preeclampsia, nearly all are for identifying high-risk subjects. However there is hardly any research work published that can guide us to low-risk subjects. These are the days of not stopping at identifying high-risk but actually identifying low-risk subjects of preeclampsia. Why do we need to identify the low-risk subjects also? It has been found in clinical practice long since that not being high-risk does not necessarily mean one is low-risk. There are majority of subjects who are not high-risk but are also not necessarily low-risk. As a result we all are over using prophylactic measures. Also we are scared to stop prophylaxis once a subject is labelled high-risk and is never tested again. While pregnancy is a dynamic state, it surely happens that some subjects who may be high risk initially may cease to be so as pregnan...