With ds2 he engaged at around 36 weeks (just the same time as ds1 did) at 3/5 and stayed at 3/5 engaged until labour started, although second babies can engage and then decide to unengage and float around a bit, more space as everything has already been stretched. Even though ds2 engaged at 36 weeks he didn't arrive till 41 weeks, so in my case things didn't happen earlier, that's not to say it won't for you though! All the best!