does this disease cause any reproductive disturbances?
Yes, At least 97% of men with cystic fibrosis are infertile, but not sterile, and can have children with assisted reproductive techniques.
Cystic fibrosis
 At least 97% of men with cystic fibrosis are infertile, but not sterile, and can have children with assisted reproductive techniques. 
when is an ai developed for a vitamin or mineral UNANSWERABLE how can we define the vitamin? "Vitamin K" refers to several forms of this vitamin, i.e., an essential nutrient absorbed from food, a product synthesized and marketed as part of a multi-vitamin or as a single-vitamin dietary supplement, and a prescription medication for specific purposes what happens when it is deficient? Liver damage or disease (e.g. alcoholics), cystic fibrosis, or inflammatory bowel diseases what are the symptoms of the second disease? The main signs and symptoms of cystic fibrosis are salty-tasting skin, poor growth and poor weight gain despite normal food intake, accumulation of thick, sticky mucus, frequent chest infections, and coughing or shortness of breath
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Cystic fibrosis [SEP] Infertility
Infertility affects both men and women. At least 97% of men with cystic fibrosis are infertile, but not sterile, and can have children with assisted reproductive techniques. The main cause of infertility in men with CF is congenital absence of the vas deferens (which normally connects the testes to the ejaculatory ducts of the penis), but potentially also by other mechanisms such as causing no sperm, abnormally shaped sperm, and few sperm with poor motility. Many men found to have congenital absence of the vas deferens during evaluation for infertility have a mild, previously undiagnosed form of CF. Around 20% of women with CF have fertility difficulties due to thickened cervical mucus or malnutrition.