Cystic fibrosis is a fatal genetic disease that affects approximately 70,000 people worldwide. Cystic fibrosis, also known as CF, is a hereditary disease, meaning the affected person got the disease from their parents. To have CF, a person must inherit two defective copies of the CFTR gene. This means they will inherit one copy from each parent and the parent will likely not have CF themselves, making them a CF carrier. Cystic fibrosis is caused by a mutation in the CFTR gene. This gene is responsible for making a protein that controls the transport of water and salt into and out of the body's cells (Explore Cystic Fibrosis). However, when the gene has a defect, it results in thick, sticky mucus and unusually salty sweat. Normally, mucus protects and lubricates the mucous membranes of the respiratory tract, digestive system, reproductive system, and other important tissues and organs. In the male reproductive system, men with cystic fibrosis are sterile because they are born without the vas deferens. In the female reproductive system, mucus affected by cystic fibrosis can block the cervix, preventing...