From week 6, week 8, week 12, 16, 20, 24, 28, 32, I forgot I think 34 35 36 37 38 39 40 all inclusive..
Last time Dr. Ang he won't make me an appointment on my week 36 liao!! After week 32 he make me appointment on week 37!!
Luckily I walk in to his clinic on week 36 and he said I will deliver early, like next week like that and it's true..