How often do you have your baby weighed?

[candj]

I am taking my DS (15 weeks old) to be weighed every fortnight but I am getting the impression from the HV that this is excessive - what do others do?

I haven't taken dd3 since she was born

she is 6 months now

she was on the 2nd centile at birth and quite honestly I could do without all the frowny frowny supplementing crap I would have got