Minipuberty
Activation of the hypothalamus-pituitary-gonadal axis in the first months of life
Thelarche
The onset of breast development
Menarche
The first spontaneous menstrual bleeding
Puberty
Period in which transition from childhood to adulthood and biological changes that lead to reproductive capacity take place.
Pubarche
The appearance of pubic and/or axillary hair
Gonadarche
Pubertal reactivation of the hypothalamic-pituitary-gonadal axis
Adrenarche
(Re)activation of the adrenal zona reticularis to produce androgens
Disorder/difference of sex development (DSD)
Congenital conditions in which chromosomal, gonadal or anatomical sex is atypical
Ambiguous genitalia
Genitalia that are neither typically female nor typically male
Central precocious puberty
Onset of breast development before age 8 years due to premature activation of the hypothalamus-pituitary-gonadal axis
Delayed puberty
The absence of breast development by age 13 years
Hypogonadotropic hypogonadism
Reduced gonadal sex steroid production due to insufficient secretion of GnRH and/or gonadotropins
Hypergonadotropic hypogonadism
Reduced gonadal sex steroid production due to an impaired response to gonadotropins
Constitutional delay of growth and puberty
Late but spontaneous puberty before age 18 years, often familial
Primary amenorrhoea
Failure to reach menarche by age 16 years or within five years after the onset of breast development
Haematocolpos
Menstruation blood accumulates in the vagina above the imperforate hymen
Haematometra/haematosalpinx
Menstruation blood accumulates in the uterus/fallopian tubes
Gender identity
One’s internal, deeply held sense of one’s gender
Gender dysphoria
The distress and unease experienced if gender identity and sex assigned at birth are not completely congruent