I'm wondering why are some newborn babies affected by mother with lupus and others are not?

See below: If the mother's lupus was under control prior to conception, the baby and mother will have a better outcome. If it was not, the baby and mother are apt to have complications. Also if there is a history of renal disease prior to conception, there can be a higher of complications during the pregnancy. In addition if the mother has diabetes and or hypertension, there is a higher risk of complicatio.