Typically girls with cystic fibrosis will find puberty is delayed by 18 to 24 months, sometimes longer, which may cause anxiety if they feel out of place among their peers. However, they do catch up and will start to develop adult bodies.
Women with cystic fibrosis are more likely to experience problems with fertility, as they may suffer from irregular periods and therefore not ovulate regularly. In addition, the mucus in the vagina is thicker which makes it more difficult for sperm to reach the egg.
Again, the onset of puberty in males with cystic fibrosis can be delayed by anywhere from 18 months to two years, which can make them look smaller and less developed than their classmates. However, they will catch up and develop naturally.
When it comes to fertility, around 98 percent of men with cystic fibrosis will be unable to father children without fertility help. This is because the vas deferens tube (which carries sperm from the testes to the penis) is either blocked or missing altogether. They will be able to produce healthy sperm, but will not be able to transport that sperm to be able to naturally impregnate their partner.