Every woman and every pregnancy is different. Yes, it is annoying when people do this. I was 21 when I was pregnant with my first. I was thin and 5-4. I carried all over and looked much further ahead. Even I thought the date may be wrong, lol. People thought I was having twins. Well, I was only 4 days over my due date and he weighed 9-10 and 22" long.
I was 29 with my second, was much thinner to start but carried like a basketball in front and no one knew I was pregnant from behind. I swore the doc had my due date wrong by a month, because he was so compact in there it was crazy. He was 4 days early from the due date and weighed in at 8-11 but would have weighed more if he would have gained weight properly during the entire pregnancy.
With my triplets, you don't even want to know how I looked, lol. At 8 weeks people were asking when I was due. I had 4 in there but didn't know it. I was already wearing maternity underwear, lol. Even with multiple pregnancies some carry way out front and some carry all around.
I found people who asked odd questions or made comments were ripe for comments shooting back. Just have some handy comments to send back to them. I once told a woman, a stranger, that she had a flat butt after one of her comments and walked away. And when strangers touched my stomach and reached back and touched theirs. I was tempted to touch a woman's breast to make a point but couldn't cross that line, lol.
K. B
mom to 5 including triplets