Women with autism display characteristics similar to men, but often with a twist. It's important to be alert to how ASD features may present in the female.
One of the criteria for autism has to do with ritualistic behavior. Ritualistic means "invariably performed in the same way." Difficulty within the center and front of the brain can lead to sticky and repetitive behavior. Someone may say, "I always brush my teeth before my shower. I never brush my teeth after." Sometimes the order in which tasks are completed is very important to the individual. The autistic person may get stuck in routines like taking the same route to work every day, parking in the same spot in parking lots, and ordering the same meals at restaurants.
Although many people will say, "Well, I do that too" or "Everyone likes routine," for the ASD individual, the stickiness and rigidity of the routine is very significant. When the behavioral pattern is prevented, the autistic individual becomes very stressed and may have a meltdown (externalizing reaction) or appear to mentally shut down (internalizing reaction).
One thing I have learned in my practice is the importance of asking females on the spectrum if they have any mental rituals. Females may be more able to "mask" autistic characteristics with others, and therefore the qualities may go unnoticed even while causing significant fatigue and stress for the individual. Examples of mental rituals may include counting streetlights while riding in a car, mentally reciting all the prime numbers backward from 100, or mentally sorting daily experiences into an image of a pyramid with different sections and meanings.
It's not that any of these habits are "wrong," but rather that the brain that leans toward those behaviors may have certain subcortical/frontal lobe characteristics. Other ASD qualities may also be present for this individual. The real price to pay is often in the mental fatigue or distress caused by the effort of performing (or not performing) the rituals in various contexts or of being more distracted than others (e.g., missing important parts of conversations because of internal processing of the ritual).
If you know a woman who may be on the spectrum, ask about hidden characteristics such as mental rituals!