If your LO has an umbilical hernia do they have trouble with their abdominal muscles (i.e. tummy time and sitting)? Owen still only has the skills of a 2/3 month old even with therapy three times a month and us doing the exercises twice a day. No one seems overly concerned yet but it only makes sense that these two things might be related since there is a lack of abdominal muscle.
BPF May 12, 2013 :: EDD Janaury 22, 2013 :: MC Began On July 14, 2013 at 12W4D
Born at 34w2d:

Re: Umbilical Hernia and Abdominal Muscles
BFP#2 3/16/11, beta 138; 4/12 Baby/HB DS born 9/10/11 at 29w4d due to partial abruption and PTL
BFP#3 8/19/13 Another boy! 17P, modified bedrest and Nifedipine helped us have a termie! DS2 born 4/19/14 at 38w5d.
It didn't seem to affect my daughter.