Relating to an obstetric cord (9)

I believe the answer is:

umbilical

(Other definitions for umbilical that I've seen before include "Cord connecting the foetus with the placenta" , "This cord attaches baby to mother" , "This cord connects foetus to placenta" , "This cord joins baby to mother before birth" , "Of the link between mother and baby?" .)

I've seen this clue in the Sydney Morning Herald.

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