What constitutes the most cautious approach for a pregnant person with weak D type 4.0?

A recent CMAJ Practice article on modern Rhesus typing in transfusion and pregnancy and its associated correspondence prompted a productive discussion on safe recommendations for pregnant patients with a weak D type 4.0 allele, originally described in 2000.3 The differing approaches represent the personal views of the respective authors. Here, Flegel et al present 5 statements they agreed based on the review of this specialized topic.