Cystic fibrosis mutation screening before assisted reproduction

Area of Science:

• Genetics
• Reproductive Medicine
• Medical Screening

Background:

• Cystic fibrosis (CF) is a common autosomal recessive disorder in Caucasians.
• Congenital bilateral absence of the vas deferens (CBAVD) affects 97-98% of men with CF, causing azoospermia.
• CF gene mutations are responsible for approximately 10% of congenital obstructive azoospermia cases.

Purpose of the Study:

• To highlight the importance of CF screening in men with CBAVD and azoospermia of unknown origin.
• To inform couples undergoing assisted reproductive technologies about the elevated risk of CF in their offspring.
• To emphasize the necessity of genetic counseling for affected couples.

Main Methods:

• Review of existing literature on CF, CBAVD, and azoospermia.
• Analysis of the genetic link between CF gene mutations and male infertility.
• Discussion of screening protocols and genetic counseling strategies.

Main Results:

• CBAVD is a strong indicator of CF in men with azoospermia.
• CF gene mutations are a significant cause of obstructive azoospermia.
• Couples seeking fertility treatments face an increased risk of having offspring with CF.

Conclusions:

• CF screening should be considered for men with CBAVD prior to intracytoplasmic sperm injection (ICSI).
• Men with unexplained azoospermia should also undergo CF screening.
• Comprehensive genetic counseling is crucial for couples to understand and manage the risk of CF transmission.