Beth Lunn was doing what hairstylists do: examining a client’s hair, moving pieces up and checking the texture and color. Then she stopped. She picked up another section. Looked closer. And then, without any prior conversation about it, asked her client, “Are you pregnant?” The video she’d been recording for her Instagram page, @honeylunnhair, cut off there. The client, later identified as Chanelle Adams, laughed nervously and kept asking, “What? Why?” Lunn asked again. Adams repeated, “Why?” A few rounds of that, and then Adams looked straight at the camera and said, “Not in the video,” before Lunn ended the recording. Within three days, the clip had reached 126 million views and 5 million likes, with one question dominating every comment section: how on earth did she know? View this post on Instagram The answer, it turns out, is rooted in real biology. Lunn followed up with a second video after being flooded with questions, sharing photos of a client who was five months postpartum and walking through the science. As she explained it, “hormonal change causes an increase in estrogen and progesterone, which can alter the hair’s pigment (melanin).” She was careful to note that results vary from person to person, and that there is no “scientific evidence” that coloring one’s hair while pregnant causes harm to the baby, though she leaves that decision to her clients. The hormonal explanation holds up. According to experts at BehindTheChair.com, elevated estrogen and progesterone during pregnancy can prolong hair growth cycles, change density, and shift the way hair looks and feels entirely. Texture, color, and even how it takes dye can all change. View this post on Instagram On the question of coloring specifically, the NHS notes that most research shows it’s safe to dye or color your hair while pregnant. The chemicals in permanent and semi-permanent dyes could cause harm, but only in very high doses, and the amount absorbed through the scalp during a normal appointment is very low. Still, many people choose to wait until after the first 12 weeks, when the risk is lower. Worth knowing: if you’re in your second or third trimester, your hair may react differently to color than it normally would. Commenters who watched the original video had their own theories about exactly what Lunn saw. @nicole.marie44 wrote, “Your hair tells you so much about your health! She probably saw banding in her hair, and that is common with pregnancy.” @asmaiel_soulvane put it simply: “If she could tell someone is pregnant from their hair. She’s worth the money hands down.” Lunn hasn’t revealed exactly what visual cue tipped her off, which probably explains why people keep watching. You can follow Beth Lunn (@honeylunnhair) on Instagram for more entertaining and hair-related content. The post A stylist noticed a subtle change in client’s hair and immediately asked if she was pregnant appeared first on Upworthy.