Birth order refers to the order a child is born in their family; first-born and second-born are examples. Birth order is often believed to have a profound...

The Birth Order Book: Why You Are the Way You Are is a 1982 non-fiction book by Christian psychologist Kevin Leman on birth order and its potential influence...

Fraternal birth order, also known as the older brother effect, has been correlated with male sexual orientation, with a significant volume of research...

Birth is the act or process of bearing or bringing forth offspring, also referred to in technical contexts as parturition. In mammals, the process is...

parts: a title, a birth order name and a personal name. Balinese people do not use a family name. Both boys and girls receive birth order name from a small...

of multiple births. In the United States, it has been estimated that by 2011, 36% of twin births, and 78% of triplet and higher-order births resulted from...

A birth defect, also known as a congenital disorder, is an abnormal condition that is present at birth regardless of its cause. Birth defects may result...

This is a list of multiple births, consisting of notable higher order (4+) multiple births and pregnancies. Twins and triplets are sufficiently common...

A birth certificate is a vital record that documents the birth of a person. The term "birth certificate" can refer to either the original document certifying...

Birth rate, also known as natality, is the total number of live human births per 1,000 population for a given period divided by the length of the period...