#1 “Woah! Are you having twins?”
#2 “So when are you getting induced?”
#3 “Was it planned”
#4 “WOW. You look awful/tired!”
#5 “You look like you could pop any minute!”
#6 “You DO know what causes that, right?”
#7 “Are you sure you aren’t due this month??”
#8 “Oh, you’re pregnant? I thought you had just gained a lot of weight.”
#9 “Wow, you look like you ate a whale!”
#10 “I’m glad I’m not you!”
#11 “You don’t need to be superwoman. Just get the drugs next time.”
#12 “Haven’t you had that baby yet?!”
#13 “You’re too young/old to be pregnant.” OR “You’re pregnant? At your age!”
#14 When they say, “Oh…I’m sorry,” when you tell them it’s a girl/boy and you already have one (or more)
of the same gender.
#15 “Better get a C-section! You’re HUGE!”
#16 “Are your twins natural or did you take drugs?!”
#17 “OMG. You’re pregnant AGAIN?”
#18 “So you’re done now, right?”
#19 “Can I touch your belly??!” …as they are already touching your belly.
#20 “OMG, my friend, she had, like, the worst birth EVER…” and then proceed to tell you horror stories.

source: http://www.thepolivkafamily.com/2013/07/20-things-not-to-say-to-a-pregnant-woman/
Have some to add?

21. Will My Penis Poke The Baby During Our Coital Gymnastics?

who?