Is Pregnancy Lips a Thing?

Move over, morning sickness and sore feet. Khloe Kardashian claims she suffered from an unusual pregnancy symptom: swollen lips. Fans were quick to notice her plump pout during the latest Keeping Up With the Kardashians episode, which premiered Sunday night on E! The 34-year-old reality star, who gave birth to daughter True Thompson in April, defended her changing body on social media.

“PSA I was pregnant during this entire season of KUWTK. Some women get 'pregnancy lips.' I was one of them. So my lips look crazy and massive. Trust me I know and I HATED it!” Khloe wrote on Instagram stories, adding that viewers should “just watch the show and be kind” about the change.

But given the Kardashian family’s affinity for full lips (Kylie famously admitted to getting temporary lip injections in May 2015), fans may be wondering about the legitimacy of the symptom. PEOPLE spoke with Dr. Sherry A. Ross, women’s health expert and author of she-ology. The Definitive Guide to Women’s Intimate Health. Period, to confirm that, yes, some moms-to-be do experience larger lips.

“There is definitely some truth to as your belly grows so can your lips,” says Dr. Ross. “Swelling is a normal part of pregnancy and it happens in just about every part of your body including your lips.” She adds that increased blood flow throughout the body helps contribute to pregnancy glow.

Even so, the symptom isn’t very common. Most moms-to-be won’t experience plumper pouts, and the few who do won’t see lasting results. “Once you give birth, your body will deflate over 3 to 6 months, as will your lips,” says Dr. Ross.

At the end of the day, women should embrace the natural changes of their body during pregnancy—and possibly gain some reassurance from Khloe. “A lot of wild (stuff) happens to your body and face while pregnant. It’s out of our control,” she continued on her Instagram story. "Pregnant women should be off limits.”