The body of someone with XX chromosomes can have a broad range of variations in how their Müllerian ducts (which typically form the uterus, cervix, fallopian tubes, and upper portion of the vagina) develop. People with the MRKH are at one end of this spectrum of variations. Other people with these anomalies have intersex variations related to their cervical, vaginal, and/or uterine development that may be less noticable.
For example, someone may have a variation that causes their uterus to develop with a different shape than difficult, or to be doubled. Other people with Müllerian Duct Anomalies may have vaginal variations such as a "hemivagina" - which is where one side of the vagina is obstructed, sometimes resulting in menstrual blood from being blocked from exiting the body. Some may have a vaginal septum. Another example is someone with a doubled cervix, or a cervix that is divided with a septum.
These variations do not usually cause someone to have any variations relating to their ovaries or hormone production.
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