Sapphire/Tabby,
I just told her, I've informed my boss and my boss is aware of my pregnancy. She asked if I only informed and I told her " I informed my boss the first thing I know I'm pregnant" and she goes, oh cause you didn't inform local HR so we thought you are trying to keep mum abt your pregnancy. I told her I didn't know I need to inform since I've informed my boss and I thought my boss would have informed her. The HR manager just smiled and said "Oh, no worries we just want to be sure that your pregnancy is noted by your boss as we are worried about your backup plan when you go on maternity".
I just smiled back and said "I've discussed about my backup plan when I was travelling with my boss during Dec and we're trying to add on 1 headcount in Sg so if there is one, the new girl can be my backup alternatively, I have another counterpart who used to do my job prior to me joining, so he can help out as well" She just replied "ok fantastic!" I was thinking to myself, you're just the HR, it should be my boss worrying about my backup and not you but guess she just want to be safe since its part of her job.