Prenatal care schedule?

[expert@preeclampsia.org]

I want to ask "how is the criteria of regularity of prenatal care in pregnant women with preeclampsia??"
I have read an article about antenatal care in normal pregnancy. It said that regular antenatal is if the expectant mother is perform ≥ 4 prenatal visits, less regular: 2-3 prenatal visits and irrregular if pregnant women do not just do <2 visits.The schedule of visits should be more stringent in the high risk pregnancy,  especially preeclampsia. then how the criteria of regularity of antenatal care in pregnant women with preeclampsia? how many times they have to check the pregnancy so it can said that is regular? is there the same criteria between normal pregnancy and pregnacy with preeclampsia?

[expert@preeclampsia.org]

If a woman is managed as an outpatient with preeclampsia, she will be seen once or twice a week. 

There is no real standard.