What do systematic reviews say?

Universal screening vs case finding

Universal screening showed no clear difference in pre‐eclampsia compared with case finding (moderate certainty).

• Screening and subsequent management for thyroid dysfunction pre‐pregnancy and during pregnancy for improving maternal… 2015 · Cochrane Headline outcomes only
  RR 0.87 [0.64, 1.18]
  1 study · 4516 participants
  Moderate