Morbus.com suggests that Kinderkrampfe (eclampsia infantum) might have been a
type of Eclampsia/Eclampsy. "Sometimes applied to a form of puerperal convulsions
resembling epilepsy in severity."
It certainly was very common. When mother's were giving birth almost every year it is
hard to imagine how their bodies could recover. Even in US modern times, 1860-1900,
cemetery records will have pages of tiny babies & stillborns. Sometimes almost every
child in a family was stillborn or died after a few days. Maybe the RH factor played a
roll before we knew what it was.
My great grandfather was the eldest of 9 children of his father's second wife. Only he
and sibling number 7 survived. 4 died of Infant convulsions including twins. 3 were
stillborn. I find Krampfe listed on various sides of my family.