Birth order theory suggests that the order in which children are born affects their personalities. Whether a child is the firstborn, a middle child, the youngest, or an only child may affect how their family treats them, how much attention they receive, and how they may compete for their parents' attention.

Pre-existence, preexistence, beforelife, or premortal existence, is the belief that each individual human soul existed before mortal conception, and at some point before birth enters or is placed into the body.

Choosing natural childbirth means that women prepare for the birth of their babies confident in their own ability to give birth, being willing to feel contractions, and finding comfort in response to what they are feeling.

The history of birthdays came as pagans thought the evil spirits lurked around with malicious intentions during major days of changes, like the time you grew a year older. There were also ancient Greek philosophies that believed that spirits attended one on their birthdays to keep a watch.