Where is Kate Middleton’s Baby Bump?

Leave it to a princess to magically have babies without ever looking pregnant. On Friday, Kate Middleton stopped by the Fostering Network, a foster care charity in London, and the Duchess, who is approximately 26 weeks pregnant, sported a barely-there bump underneath her dark brown shirtdress.

I’ve always heard that you show sooner with your second pregnancy, but Kate — who didn’t pop until she was about 8 months along with Prince George — certainly doesn’t look like someone who is six months pregnant. So what gives?

“The way pregnancy settles in each woman is different,” Dr. Teri Benn, an OB-GYN at FemCare OB-GYN in Miami, tells Yahoo Parenting. “Typically, we expect someone at a normal weight to gain 25 to 35 pounds during their pregnancy. Before 20 weeks, everything is below the belly button so the belly is concealed lower down in the pelvis. At 20 weeks, the top of the uterus is at the belly button, so that’s when you will start seeing pregnancy in most women.”

The Duchess’ height — she is 5-feet 9-inches (of course she is) — might contribute to her seemingly small belly, too, Benn says. “She’s a tall girl, so there may be more space for the pelvis to grow upwards, whereas if the torso is short, there may be less room to grow up so it pops out,” says Benn, who points out that the effect of height on baby bumps is purely anecdotal.

And my assumption that Kate would have popped by now since she’s on baby number two? A myth, says Benn. “Different women carry differently based on baseline anatomy and body shape,” she says. “And just like every woman is different, every pregnancy is different.”

More than anything, though, Benn says Kate’s hidden bump is probably a product of her wardrobe. “Often, the clothes we see Kate in have a lot of material,” she says. “If she was wearing a T-shirt and exercise pants, I bet you’d be able to see her pregnancy.”

We’ll probably never know. Just a hunch, but I don’t see any Lululemon in Kate’s future.