My 2nd DS is 11 months old and is sitting well under the centile chart, not even just a little bit. He is 11 months and 66cm. I guess I'm looking for anyone who had similar and to learn what the outcome was? I'm not usually one to worry too much about these things, my other DS has always sat between 9th and 25th percentile for height and this has never concerned me, however it seems more concerning that DS2 isn't even on the chart? The HV said to remeasure him in May, however someone else I know said that their son was small and tested for possible genetic causes or low testosterone, so I'm not sure if it's OK to wait until May, or perhaps ask for a second opinion and if anything needs checking? Would be great to hear of others' experiences with similar please! Thanks in advance