Pregnancy in Cystic Fibrosis

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Men

Men with CF usually manifest impaired fertility, with more than 95% of men infertile without assisted reproductive techniques.5 Congenital bilateral absence of the vas deferens (CBAVD) is commonly present, and is thought to result from in utero involution due to obstruction by desiccated secretions.6 The absence of the vas deferens is generally identifiable by palpation. The epididymis and seminal vesicles may also be atrophic.7 Semen from men with CF has been found to be of low volume, with

Genetic screening

For women with CF desiring pregnancy, determination of her CF genotype should be performed if unknown, and carrier screening for her partner should be offered.17 There are currently more than 1400 gene defects described that can lead to CF.17 The genetic testing currently available is less than 100% sensitive, with significant variations in sensitivity given the different gene frequencies among different ethnic groups. Given a gene frequency of roughly 1:25 among Caucasians, the likelihood of a

Medication use during pregnancy

The medical regimen for patients with CF is often complex, with the use of pancreatic enzyme supplements, inhaled, oral or intravenous antibiotics, mucolytics, and anti-inflammatory medications and others commonly employed to combat manifestations of this illness. Considerations during pregnancy include timing of exposure, with certain medications manifesting teratogenicity during organogenesis in the first trimester and others posing risks to organ function, growth, and viability later in

Impact on maternal lung function and mortality

The first report of a “successful” pregnancy by a CF female, published in 1960, included the sobering fact that the mother succumbed to her illness 6 weeks after delivery.27 Concern for the impact of pregnancy on maternal lung function and mortality was further raised by the publication by Edenborough and colleagues28 of the results of 22 pregnancies between 1982 and 1992 in 20 women with CF seen at 3 centers in England. In their series, mothers lost an average of 13% of their forced expiratory

Nutrition and diabetes mellitus during pregnancy

Women with CF are frequently affected by pancreatic insufficiency and malabsorption, in conjunction with increased resting energy expenditure, which makes low body weight and malnutrition important concerns in CF women even in the absence of pregnancy. The increase in resting energy expenditure during pregnancy can make weight gain during pregnancy challenging. Patients with CF also develop increasing rates of glucose intolerance with age, due to decreased insulin production, impaired insulin

Birth outcomes of CF pregnancies

Several different series have provided data for birth outcomes of CF pregnancies. There does not appear to be evidence that pregnancy in patients with CF is associated with an increased risk of fetal demise or birth defects. The majority of CF pregnancies result in live births, ranging from 67% to 85% in series from the United States, United Kingdom, Canada, and France.29, 30, 32, 33, 34 These results do not differ from pregnancy outcomes in women without CF. The most common complication of CF

Obstetric and postpartum considerations

An obstetrician with experience in high-risk pregnancies is a crucial part of the treatment team, along with a physician with expertise in the care of CF, a nutritionist, and an anesthesiologist.43 Antenatal visits should occur every 4 weeks through the second trimester, every 2 weeks thereafter, and weekly close to term, with careful attention to weight gain, glucose tolerance, and respiratory status in addition to usual obstetric care.17 During delivery, implantable venous access devices

Pregnancy following lung transplantation

Lung transplantation offers improved quality of life to patients with CF and advanced lung disease.46 Successful pregnancies following transplant of other solid organs such as heart, liver, and kidneys have been reported, with no significant risk of increased congenital anomalies or neonatal infections. Chronic rejection remains a significant challenge after lung transplantation. Outcomes for lung transplant recipients remain inferior to those seen with other solid organs.47 The International

Summary

As women with CF enter adulthood with improved health, the desire to bear and raise children is not infrequent. Careful assessment of health, including nutrition, lung function, and glucose tolerance status should be undertaken for women with CF considering pregnancy. Although pregnancy poses considerable physiologic stress, there is no clear evidence that the outcome of women with CF who become pregnant is any worse than for the population of CF women at large. The pregnancies may require

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