Step I Cleft lip

[Pholston]

FA says cleft lip results from the failure of the maxillary prominences to fuse with the medial nasal prominences.
Just did a Q on UW which says cleft lip results from the failure of the maxillary prominences to fuse with the fusion of the intermaxillary segment.
What do the experts think?

 

[Transposony]

Both are correct since medial nasal prominences fuses to form the the intermaxillary segment.