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A square for a male individual, a circle for a female, a diamond where unknown.
Also known as: Pedigree symbols, Square and circle in a family chart, Diamond in a family chart
The base vocabulary of a pedigree chart. The standard records sex as assigned at birth because the chart exists to reason about inheritance, and it provides a diamond for cases where sex is unknown or not recorded.
A square denotes a male individual, a circle a female individual, and a diamond an individual whose sex is unknown, unrecorded or deliberately not specified.
Contexts: Medicine
The distinction is recorded because sex is directly relevant to inheritance: an X-linked condition presents differently in the two, and the chart is drawn in order to reason about exactly that.
The standard addresses gender identity separately from the shape, which records sex assigned at birth for genetic purposes, and provides annotation for recording gender where it differs.
The shape is a genetic notation and is not a statement about a person's gender.
A small triangle is used for a pregnancy loss and a small filled circle for a stillbirth, so the same chart can carry outcomes that are not living individuals.
These shapes record clinical outcomes in a chart drawn to assess inheritance. They are notation, not a comment on the loss.
A plain square, a plain circle and a diamond standing on one point, each drawn as an outline of the same overall size.