Congratulations! Is that a summer due date or so?
I think the word you're searching for is "labile" but I could be wrong.
What was your PE history with your other children? Best wishes for a boring, uneventful pregnancy and delivery with this little one!
DS born Dec. 2008 at 38.5w gestation. Mild PE diagnosed 3 hours before he was born
DD born Dec. 2010 at 40w1d. BP was slightly elevated since 37w, and climbed while in labor (started on my own). Severe PE diagnosed hours after DD born.
DD born Sept. 2013 at 38w. Induced (and I had to fight for it!) due to high blood pressure. No protein, but had brisk reflexes and clonus after delivery. Doc gave me a mild preeclampsia diagnosis anyway and said I'm likely to be a chronic hypertensive later in life.