Well Emily hated it so much, I never really pushed it, as I hated seeing her get so upset over it. I have started to persevere with it for about a month now - since about three months of age, and she can tolerate it much better now - holds her head up for maybe a minute at a time now. Not great for four months, but better than it was! I think some babies are just a bit slower than others to develop different things. Im sure your LO is developing faster in other ways, so try not to worry too much. X