Yes @hogtini, and the other small handful of doubters, people DO actually say this kind of thing in real life! 
I believe you @Annalogy because this happened to me to, albeit in the 1990's.
I had been in hospital, and gone through a crippling 44 hours of labour, had an emergency c-section, was in so much pain I wanted to die, put my husband and family through hell as they were worried me and the baby were going to be OK, and then spent 11 days in hospital after.
Went out for the first time to the big shopping centre when our baby was 2 weeks old, and the FIRST person I bumped into who I knew was a male colleague of my husband's ... Did he ask 'how are you?' or say 'the baby's cute.' or anything similar?
NO! He pointed at my tummy and grinned, said 'is the baby still in there?' I said NO, with a
look, and pointed to the pram - 'she's in there' I said.
Oh, well it must be twins, and you've left one in there, coz your belly looks the same as it did before you had the sprog... haha 
Cunt.
His WIFE said 'For fuck's sake, she gave BIRTH 2 weeks ago, give her a break!' The guy looked annoyed that no-one thought he was funny, and me, my husband, and his wife were all glaring at him.
DH said, 'she will be slim again in a few months but you'll still be bald and ugly haha.' And then gave a
too.
DH didn't CARE whether I was 'slim in a few months,' by the way, he was just putting twat-face in his place.
I also got a few comments after that too; from a neighbour of my parents, a colleague of mine, and also a relative, about how it was weird I still looked pregnant, how I will look much better when the belly has gone, and how the baby weight had gone to my face. 
All within a MONTH of having the baby!
Cunts.
The vast majority of people were gracious and lovely and complimentary, but yeah, I did get a few rude comments within the first month after the birth.
@PinkHeart5914
You’ve got the wrong friends and family tbh, I’ve had 3 dc and never had comments like this!
What a supremely ridiculous thing to say. 