I am slightly worried, and know that the lovely ladies here will be able to help...
the twins have always been small, born below 0.4th centile, have once made it passed 2nd, and are now hovering and looking like they are going to fall off the 0.4th again.
So, is failure to thrive only applied to children who were born further up the chart and then drop off, or would it also apply to the situation above?