In our experience, no. But this depends on sibling ages and your family dynamic. If the gender is kept a surprise, older siblings might be more focused on the excitement of the unknown. This can foster a sense of togetherness as they anticipate and speculate about the baby's arrival. If older siblings know the baby's gender in advance, they might feel more connected to the baby during the pregnancy. Overall, we involve our older kids in preparing for a new baby whether we know the gender or not which has led to the older kids feeling bonded with their new sibling.