Pregnancy in Kidney Transplant Recipients

Maternal and neonatal outcomes for kidney transplant recipients

OBJECTIVE

To report pregnancy outcomes for women with kidney transplantation and investigate whether different intervals after transplantation have different effects on pregnancy outcomes.

METHODS

A single-center retrospective study was performed. Based on intervals after transplantation, pregnant women with kidney transplantation are divided into two groups: intervals <5 years and ≧5 years. The maternal and neonatal outcomes were compared between the two groups.

RESULTS

No maternal and neonatal deaths occurred. The average age of mothers during pregnancy was 32.3 ± 4.1 years and they had a functioning transplant for 4 (interquartile ranges, 3, 6) years. Preeclampsia occurs in sixteen (16.5 %) pregnancies and gestational diabetes (GDM) occurs in twenty (20.6 %). Eighty-eight newborns (90.7 %) had a gestational age of <37 weeks. The average gestational age for live births was 33.8 ± 2.2 weeks and the average birth weight was 2285.6 ± 581.8 g. Neonatal respiratory distress syndrome (NRDS) occurs in fifty-one babies (52.6 %), intraventricular hemorrhage (ICH) occurs in twenty-nine (29.8 %), atrial septal defects (ASD) occurs in thirty-two (32.9 %) and bronchopulmonary dysplasia (BPD) occurs in seven (7.2 %). Further analysis, pregnancy results, including pre-eclampsia, hypertension or GDM, did not differentiate between the two groups (intervals <5 years vs. ≧5 years). Neonatal outcomes, including premature delivery, low birth weight, mode of birth, small for gestational age (SGA), RDS, ICH, ASD, BPD were not distinguishable between the two groups (intervals <5 years vs. ≧5 years). The level of neonatal blood creatinine after birth was linearly related to high maternal creatinine, and can drop to normal levels within a week.

CONCLUSIONS

The incidence of maternal and neonatal complications in pregnancies following kidney transplantation is still high, despite the success of most pregnancies. Various posttransplant intervals had no significant impact on pregnancy outcomes.

[Obstetrical outcome of renal transplant patients followed in a type III maternity hospital. Retrospective study from 2000 to 2020]

AIM

To describe pregnancy outcome of kidney transplant patients till 1 year postpartum.

METHODS

This retrospective, monocentric study included 15 kidney transplant patients who presented 18 pregnancies, between January 2000 and January 2020. For each of them, we searched for possible obstetrical, fetal and renal complications and we evaluated renal function before, during and after pregnancy.

RESULTS

The live birth rate was 84% (16/19) with an average gestational age at delivery of 37 weeks of gestation. The rate of prematurity was 50% (8/16), gestational diabetes was 16.6% (3/18) and preeclampsia was 27.7% (5/18). Cesarean section was performed in 61.1% (11/18) of cases including, 81.8% (9/11) unplanned surgery. The average birth weight was 2635 grams and 37.5% (6/16) of the newborn were small for gestational age. All patients had stable renal function before conception of pregnancy. We noticed two acute graft rejection during pregnancy with only one resulting in graft loss. Four patients had a reduced graft function in 12months of the postpartum.

CONCLUSION

Risk of maternal, fetal and renal complications remained high in kidney transplant recipients. Pregnancy should be carefully planned in transplanted women associated with adequate follow-up according to clinical guidelines (normal renal function and blood pressure without proteinuria before pregnancy, no recent graft rejection, period of one year after transplant respected and no teratogenic treatment in the month before pregnancy).

Pregnancy outcomes post-kidney transplantation across 23 years

BACKGROUND

Pregnancy in kidney transplant recipients has become increasingly common. However, pregnancy carries higher risks to these patients compared to the general population.

AIMS

To describe pregnancy outcomes in kidney transplant recipients.

MATERIALS AND METHODS

We conducted a single-centre retrospective cohort study of kidney transplant recipients who delivered after 20 weeks gestation at a quaternary hospital in Victoria, Australia, between 2000 and 2022 inclusive.

RESULTS

The study included 37 pregnancies from 27 patients, accounting for 38 infants. Over half of recorded pregnancies occurred in the past five years (56.8%, n = 21). There were high rates of pre-existing hypertension (75.7%, n = 28). Pregnancy-induced hypertension and pre-eclampsia were common antenatal complications (21.6%, n = 8 and 48.6%, n = 18 respectively). Soluble fms-like tyrosine kinase-1 / placental growth factor ratios were elevated in all patients who developed severe pre-eclampsia (16.2%, n = 6). The median gestational age at birth was 36.4 weeks (range 20-40.4, Q1 32.9, Q3 37.6) and 59.5% (n = 22) of births were preterm. Unplanned caesarean without labour was the most common mode of birth (35.1%, n = 13). The overall caesarean rate was 62.1% (n = 23). Post-partum haemorrhage complicated over half of pregnancies (56.8%, n = 21). Fifty percent (n = 19) of infants were admitted for neonatal care, in particular neonatal intensive care, and had low birthweights under 2500 g. While there was a transient deterioration in kidney function, there was no graft rejection within one year of birth.

CONCLUSIONS

Clinicians should consider the high rates of pre-existing hypertension, preterm birth, and caesarean birth when counselling and managing pregnant kidney transplant recipients.

Use of everolimus following kidney transplantation during pregnancy: A case report and systematic review

OBJECTIVE

There is limited safety data on the use of everolimus during pregnancy. In this study, we present the maternal and neonatal outcomes of everolimus used throughout the course of pregnancy and conducted a systematic review of reports of everolimus use after organ transplantation during pregnancy.

CASE REPORT

A woman with type 1 diabetes who underwent kidney transplantation was treated with tacrolimus, everolimus, and prednisolone. Two years later, she became pregnant. At 27 weeks of gestation, an emergent cesarean delivery was performed owing to severe preeclampsia and fetal distress. No congenital malformation was noted in the baby at a corrected age of 4 months, and the maternal renal function remained stable.

CONCLUSION

Our systematic review did not identify evidence of teratogenicity in babies exposed to everolimus as an immunosuppressant after transplantation. To better assess the risk of exposure to everolimus during pregnancy, all cases of new pregnancies occurring in transplant recipients receiving treatment with mammalian target of rapamycin inhibitor inhibitors should be reported.

Does Intrauterine Exposure of the Foetus to Immunosuppressive Drugs Used by the Mother—The Organ Recipient—Affect the Development of Post-Vaccination Immunity against Selected Viral Diseases in Children of These Mothers in Postnatal Life?

Background: Pregnancy in women who are organ recipients has long been a controversial issue due to the lack of data on the safety of immunosuppressive drugs for the developing foetus. Scientific data show that the effect of immunosuppressants on the foetus causes an impairment of T and B lymphocyte function and a reduction in their total number. For this reason, some authors recommend delaying the obligatory immunization of infants. The aim of the study is to analyse the impact of chronic immunosuppressive therapy used during pregnancy by women after organ transplantation on the effectiveness of anti-viral vaccinations in the children of these women. Methods: Concentrations of post-vaccination IgG antibodies (measles, HBV, polio) in 18 children of post-transplant mothers (9KTRs; 9LTRs) were determined using the ELISA method. The results were compared with the control group (n = 21). The incidence of vaccination AEs was also analysed. Results: There were no significant differences between the analysed groups in the concentrations of antibodies against HBV, measles and polio (p > 0.05). Conclusions: No difference was observed in the immunogenicity of HBV, polio and measles vaccinations between children of post-transplant mothers and the general population. The immunization of children of post-transplant mothers is safe, and the percentage of adverse post-vaccination events does not differ from the general population. The obtained study results do not indicate the necessity for modifying the vaccination program for HBV, measles, and polio in this group of patients.

The management of women with kidney disease

Chronic Kidney disease (CKD) is more prevalent among women than men in the United States. This review highlights the important yet unique considerations that should be made in the care of women with kidney disease including psychosocial issues, preventive care and family planning. We emphasize the critical work that needs to be performed to prevent kidney disease progression in this population and manage comorbid conditions. Significance statement: The health of women with kidney disease has been understudied. This review offers insights on key areas in the management of women with kidney disease.

Acute kidney injury during pregnancy in kidney transplant recipients

Pregnancy-related acute kidney injury (AKI) is a public health problem and remains an important cause of maternal and fetal morbidity and mortality. The incidence of pregnancy-related AKI has increased in developed countries due to increase in maternal age and higher detection rates. Pregnancy in women with kidney transplants is associated with higher adverse outcomes like preeclampsia, preterm births, and allograft dysfunction, but limited data exist on causes and outcomes of pregnancy-related AKI in the kidney transplant population. Diagnosis of AKI during pregnancy remains challenging in kidney transplant recipients due to lack of diagnostic criteria. Management of pregnancy-related AKI in the kidney transplant population requires a multidisciplinary team consisting of transplant nephrologists, high-risk obstetricians, and neonatologists. In this review, we discuss pregnancy-related acute kidney injury in women with kidney transplants, etiologies, pregnancy outcomes, and management strategies. This article is protected by copyright. All rights reserved.

Parenthood with kidney failure: Answering questions patients ask about pregnancy

Achieving parenthood can be an important priority for women and men with kidney failure. In recent decades, the paradigm has shifted toward greater support of parenthood, with advances in our understanding of risks related to pregnancy and improvements in obstetrical and perinatal care. This review, codesigned by people with personal experience of kidney disease, provides guidance for nephrologists on how to answer the questions most asked by patients when planning for parenthood. We focus on important issues that arise in preconception counseling for women receiving dialysis and postkidney transplant. We summarize recent studies reflecting pregnancy outcomes in the modern era of nephrology, obstetrical, and perinatal care in developed countries. We present visual aids to help clinicians and women navigate pregnancy planning and risk assessment. Key principles of pregnancy management are outlined. Finally, we explore outcomes of fatherhood in males with kidney failure.

Pregnancy Outcomes After Kidney Transplantation and Long-Term Evolution of Children: A Single Center Experience

BACKGROUND

Pregnancies in women who underwent kidney transplants are at high risk compared with the general population.

METHODS

In this study, we aimed to retrospectively assess the obstetrical complications, delivery outcomes, and impact of pregnancy on kidney allograft function in a single-center cohort of kidney transplant recipients (KTRs). We provide data regarding the long-term evolution of children.

RESULTS

Thirty-two KTRs underwent a total of 57 pregnancies between 1994 and 2010. Fourteen pregnancies (24 %) did not survive caused by miscarriages (n = 9), stillborn (n = 1), ectopic pregnancies (n = 2), and medical abortion (n = 2). Live birth occurred in 76% of pregnancies. Delivery was by cesarean in 66%. The mean gestational age was 30.45 ± 11.3 weeks and 65% of newborns were premature. A low birth weight <2500g was noted in 46%. Obstetric complications were de novo hypertension in 4%, pre-eclampsia in 9%, and gestational diabetes in 2%. The 5- and 10-year post-delivery death-censored graft loss rates were 3.1% and 12.5%, respectively. Data on 21 children were collected via a self-questionnaire. After a median follow-up time of 17 years, they appeared in good medical and psychological health. None of them suffered from chronic disease (especially uronephrological condition) or was taking chronic medication.

CONCLUSIONS

Long-term evolution of children born to women who underwent kidney transplants seems favorable. Pregnancies in KTRs are successful in two-thirds of cases but are at increased risk of prematurity, delivery by cesarean, and low birth weight.

Sexuality, Contraception, and Pregnancy in Kidney Transplantation

Sexual dysfunction is defined as any abnormality in sexual arousal, libido, intercourse, orgasm, or satisfaction. It is prevalent in patients with chronic and end-stage kidney disease, with 70% to 84% of men and 30% to 60% of women reporting some form of sexual dysfunction. Although kidney transplantation improves the overall quality of life for patients receiving dialysis, it can have unexpected effects on sexual function owing to the use of immunosuppressive medications and comorbid illnesses. It is important to recognize these adverse effects and pre-emptively discuss them with patients to help mitigate consequent psychosocial discontent. Women of reproductive age will often recover fertility after kidney transplantation and therefore need to be empowered to prevent unwanted pregnancies and plan for a safe pregnancy if desired. Complications such as preeclampsia, pregnancy-induced hypertension, gestational diabetes, ectopic pregnancy, still birth, low birth weight, and preterm birth are more common in pregnant women with a kidney transplant. Careful monitoring for infection, rejection, and immunosuppressive dose adjustment along with comanagement by a high-risk obstetrician is of utmost importance. Breast-feeding is safe with most immunosuppressive medications and should be encouraged.