What is why are younger siblings taller?

There is no definitive answer to this question, but research has suggested that younger siblings may be taller for several reasons.

Firstly, parental nutrition and health habits may improve over time, resulting in better prenatal and childhood health for younger siblings. Additionally, parents may be more likely to provide a more nutritious diet and better healthcare for their later-born children as they have gained parenting experience and knowledge.

Secondly, there may also be a genetic factor to consider. Research has shown that younger siblings may receive a higher number of height-promoting genetic variants than their older siblings. This means that younger siblings may inherit more favorable genes for height.

Lastly, birth order and family dynamics may play a role in height differences between siblings. Younger siblings may receive more social and emotional support from their older siblings, which could positively impact their self-esteem and overall health. Additionally, older siblings may experience more competition and stress around achieving milestones, which may negatively impact their growth.

Overall, multiple factors may contribute to younger siblings being taller, including nutrition, genetics, and family dynamics.