In a viral TikTok video, therapist Kati Morton highlights signs of "eldest daughter syndrome," including a strong sense of familial responsibility, people-pleasing tendencies, and resentment towards siblings and parents. While online discussions and memes celebrate firstborn daughters, mental health professionals caution against overemphasizing the impact of birth order on personality. Studies show limited evidence linking birth order to traits, with some suggesting that cultural practices and family dynamics may play a role. Therapist Sara Stanizai runs a group where participants reflect on how their birth order has shaped their lives, acknowledging that regardless of scientific evidence, people seek self-understanding through concepts like birth order.