Almost 31 weeks and touch wood, so far nothing despite a rapid growth spurt! My sis reached 35 weeks (20 years ago) before they exploded over night on her belly. I haven't religiously been putting anything on my stomach, just bio oil when I think about it.
I'm sure they will appear but not looking forward to them as, well let's face it, they ain't attractive ( just like my lady garden at the minute ... Haven't been able to see that without a mirror for a few weeks )