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- W2012022142 abstract "To the Editor: Gestational diabetes mellitus is the onset of glucose intolerance during pregnancy. Pregnancies complicated with diabetes are at increased risk for many maternal and fetal complications, including cesarean delivery, macrosomia, neonatal hypoglycemia, stillbirth, shoulder dystocia, and congenital malformations.1 However, few epidemiologic studies have evaluated associations between gestational diabetes and the risk of cryptorchidism (failure of one or both testicles to descend into the scrotum) or hypospadias (urethral opening on the ventral side of the penis). Shared risk factors for cryptorchidism and hypospadias include intrauterine growth restriction (small for gestational age), low birth weight, preterm delivery, and concomitant genital abnormalities. These two defects are commonly associated with testicular cancer risk in adult life2; thus, gaining a better understanding of their etiology that may provide new means of identifying men at risk of developing testicular cancer. In Israel, universal gestational diabetes screening is conducted in accordance with American Diabetes Association guidelines, and approximately 90% of the pregnancies in the Maccabi Healthcare Services healthcare maintenance organization (HMO) between 2000 and 2010 were screened.3 Using administrative and clinical data, we conducted a population-based retrospective cohort study in this HMO to evaluate the association between gestational diabetes and two common male congenital anomalies, cryptorchidism and hypospadias, in male offspring. Details on the study methods and characteristics of the study cohort are provided in the eAppendix (https://links.lww.com/EDE/A737) and the eTable (https://links.lww.com/EDE/A737). Associations between gestational diabetes and the risk of cryptorchidism and hypospadias were estimated separately, using unconditional logistic regression analyses adjusting for year of birth, maternal age at oral glucose tolerance test, maternal birthplace, socioeconomic status, history of infertility, use of in vitro fertilization, and history of polycystic ovarian syndrome. The study included 150,144 mother-infant pairs. The frequency of diabetes was 40.3 per 1000 pregnancies; 3649 cases of cryptorchidism (24.2 per 1000 male births) and 2342 cases of hypospadias (15.6 per 1000 male births) were identified. Maternal diabetes was not associated with cryptorchidism (odds ratio = 0.93 [95% confidence interval = 0.77–1.10]) or hypospadias (0.83 [0.66–1.04]) (Table). Furthermore, among male children of mothers with gestational diabetes (n = 5,497), neither of the indices of diabetes severity (number of abnormal glucose tolerance test values and the use of insulin during pregnancy) was associated with the risk of either anomaly (Table).TABLE: Risk of Cryptorchidism or Hypospadias in Male Children of 150,144 Mothers Who Were Tested for Gestational Diabetes Mellitus Between 1 January 1999 and 31 December 2008, Maccabi Healthcare ServicesThe current retrospective cohort study does not support an association of gestational diabetes with cryptorchidism or hypospadias. Consistent with our study, a Swedish registry-based study (1973–1982) reported no association between gestational diabetes and cryptorchidism.4 In contrast, one case-control study reported a positive association between gestational diabetes, diagnosed based on medical record reports of diet-controlled diabetes or abnormal glucose tolerance test, and cryptorchidism.5 However, that study was based on relatively small numbers (125 cases), and only 30% of cases and 22% of controls had a glucose tolerance test during pregnancy. In the current study, all pregnancies included in the analysis were screened for gestational diabetes mellitus and approximately 90% of pregnancies in the MHS HMO during the study time period were screened.3 We are aware of three previous studies that evaluated the association of gestational diabetes with hypospadias and, consistent with our results, all reported a null association.6–8 An important strength of the current study is the direct ascertainment of gestational diabetes based on laboratory glucose tolerance tests, avoiding issues concerning self-report and inconsistent diagnostic criteria. Additional strengths of the study include its large size, retrospective cohort design, and the systematic and comprehensive collection of personal data. The study adds persuasive evidence that gestational diabetes is not associated with the risk of cryptorchidism or hypospadias. Britton Trabert Division of Cancer Epidemiology and Genetics National Cancer Institute National Institutes of Health Bethesda, MD [email protected] Gabriel Chodick Varda Shalev Tal Sella Medical Division Maccabi Healthcare Services Tel Aviv, Israel Sackler Faculty of Tel-Aviv University Tel Aviv, Israel Matthew P. Longnecker Epidemiology Branch National Institute of Environmental Health Sciences National Institutes of Health Research Triangle Park, NC Katherine A. McGlynn Division of Cancer Epidemiology and Genetics National Cancer Institute National Institutes of Health Bethesda, MD" @default.
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- W2012022142 date "2014-01-01" @default.
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- W2012022142 title "Gestational Diabetes and the Risk of Cryptorchidism and Hypospadias" @default.
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