Hi Hopehere's a medical article you might find interesting:Fertility in Men With Cystic Fibrosis(*): An Update on Current Surgical Practices and Outcomes.Chest, Oct, 2000, by Theresa J. McCallum, Jeff M. Milunsky, Donna L. Cunningham, Doria H. Harris, Thomas A. Mater, Robert D. OatesAn Update on Current Surgical Practices and OutcomesBackground: Men with cystic fibrosis (CF) have bilateral absence of the vas deferens causing an obstructive azoospermia that is not amenable to surgical correction. Advances in the field of reproductive medicine allow for the procurement of viable sperm and facilitate fertilization and pregnancy in couples where the man has CF.Objectives: To describe patient anatomy and semen characteristics and to determine the pregnancy rates of couples in whom the male partner has CF and who have undergone microsurgical epididymal sperm aspiration coupled with in vitro technology, specifically intra-cytoplasmic sperm injection (ICSI).Design: Retrospective analysis.Setting: Clinical department of urology and two reproductive medicine units.Patients: Thirteen married men with CF who were referred for infertility.Interventions: History, physical examination, semen analysis, transrectal and renal ultrasonography, CF mutation analysis, and microsurgical sperm aspiration coupled with ICSI.Results: All 13 men had low-volume azoospermia, absent vasa, and aplasia/hypoplasia of the seminal vesicles. CF mutation analysis was carried out in 11 of 13 men, and 9 of 11 were [Delta] F508 homozygous. Eight men underwent microsurgical sperm aspiration, and their partners underwent one or more cycles of ICSI. Five couples (62.5%) achieved a pregnancy, with four couples delivering (three sets of twins and one singleton).Conclusions: CF in men is accompanied by bilateral vasal aplasia. The resultant obstructive azoospermia can be treated quite successfully with a combination of sperm aspiration and ICSI. It is important for physicians involved in the care of men with CF to convey the message that prospects for fatherhood are excellent with current technology. (CHEST 2000; 118:1059--1062)Key words: cystic fibrosis; intracytoplasmic sperm injection; microsurgical epididymal sperm aspiration; vasal agenesisAbbreviations: CF = cystic fibrosis; ICSI = intracytoplasmic sperm injection; MESA = microsurgical epididymal sperm aspirationCystic fibrosis (CF) is one of the most common single-gene disorders in North America. With the combination of aggressive treatment strategies, effective antibiotic regimens, refined pancreatic enzyme replacement, and a diversity of other interventions, deterioration in pulmonary function and nutritional status has slowed while survival has improved.Marriage and the possibility of reproduction are now options to be considered. However, nearly all men with CF have absent vasa deferentia, resulting in an obstructive azoospermia that cannot be surgically corrected and precludes natural conception.[1] In the last few years, techniques to harvest sperm and to combine them with retrieved oocytes in an in vitro system have allowed these men to achieve biological paternity.[2] Surgical collection techniques include microsurgical epididymal sperm aspiration (MESA), percutaneous epididymal sperm aspiration, and testicular sperm extraction. The most common method to assist in fertilization of the oocyte is intracytoplasmic sperm injection (ICSI). Since 1991, 13 men with CF have been evaluated for obstructive azoospermia at Boston Medical Center. Described below are their clinical findings and therapeutic results, including pregnancy in five of eight couples (62.5%) who underwent sperm retrieval and ICSI. The primary intent of this study is to update the pulmonologist on the latest advances in the field of reproduction as it applies to the man with CF. With this knowledge at hand, pulmonologists will be able to inform their patients about the options for parenthood and to encourage referral to a center involved in reproductive medicine (ie, to a urologist or reproductive endocrinologist). In addition, the parents of boys who have recently received a diagnosis of CF may ask about their sons' future reproductive capability. They can be told that, at present, the chances for reproduction are excellent.CazzeXX