The fertility rate in the U.S. was on a constant decline between 2014 and 2020 and has fluctuated since then, CDC reports.

An exploration of how sibling position influences personality development. Birth order doesn't just determine when family photos are arranged.

It’s important to note that birth order isn't the only thing that can influence your parenting style. Other factors may include your family's size, socioeconomic status, the availability of ...

Clearly, birth order affects personality ... Personality: Because of their equal status in terms of age and genes, twins are usually treated the same and turn out similarly.

Or, what if you had no siblings, and could therefore claim the status (and the throne ... The History, and Frustrations, of Birth Order Research The idea that birth order serves to influence ...

Psychological Defense Mechanisms and the Hidden Ways They Shape Our Lives, explains how birth order affects your chances of success later in life. Following is a transcript of the video.