The young woman needs to be aware that Neurofibromatosis is considered to be an increased risk for pregnancy, and that if she plans to get pregnant that she and the baby need to be closely monitored. It may be a good idea to find a doctor with previous experience in the field.
In terms of her children, then the risk of her children developing the condition is about 50% ie 1 in 2 but they may be more affected by the disorder than the mother.
She should see a genetic specialist to talk through the ramifications of this, and she and her partner may need some tests to look at the genetic baseline.
I have given a link which explains about mosaicism:
http://www.genetics.com.au/factsheet/41.htm
I found it a little confusing myself in our lectures, and sometimes these facts sheets only give the general picture not what is exactly going on fdor the individual. That is why doctors who specialise in genetic disorders are the people to see first before she even thinks of pregnancy.
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