To start with, people have intersex conditions/symptomes and are not intersexed like it is very often written. It is offensive for us, because it brings it into annotation with oversexed, etc.
Intersex is a biological condition in which part of one's biology is male, while another part is female. There are many different intersex conditions or syndromes, and sometime a person has more than one condition. Intersex persons very often have some mutations, too.
As many as 50 different medical conditions are included under the "intersex" umbrella. Not all intersex people have ambiguous genitalia. Many people with intersex conditions have typical genital development. While some intersex persons identify as transgender, many do not identify as any part of the transgender community.
The following is a list of the most common intersex syndromes:
Complete Androgen Insensitivity Syndrome (CAIS)
Partial Androgen Insensitivity Syndrome (PAIS)
5-alpha-reductase Deficiency (5-ARD)
Swyer Syndrome/ Mixed Gonadal Dysgenesis (MGD)
Leydig Cell Hypoplasia
Persistent MÃ¼llerian Duct Syndrome
Hypospadias, Epispadias, Aposthia, Micropenis, Buried Penis, Diphallia
de la Chapelle/XX Male Sex Reversal Syndrome
MRKH/Vaginal (or MÃ¼llerian) agenesis
XX Gonadal Dysgenesis
Progestin Induced Virilization
Congenital Adrenal Hyperplasia (CAH)
Ovo-testes (formerly called "true hermaphroditism")
Kallmann syndrome/ Hypogonadotropic hypogonadism (HH)
Turner Syndrome (or Monosomy X)
Mosaic XY/XO and xy-Turners Syndrome
Triple-X Syndrome (also Tetrasomy X)
Details about these conditions/syndromes can be found on this website (http://www.transfaithonline.org/empower/basics/intersex/types/#c4886
Another site with valuable information on intersex subjects and conditions can be found here:https://isna.org/faq/frequency/