Bengt Kallen

Summary

Affiliation: Lund University
Country: Sweden

Publications

  1. doi request reprint Neonatal complications after maternal concomitant use of SSRI and other central nervous system active drugs during the second or third trimester of pregnancy
    Bengt Kallen
    Tornblad Institute, University of Lund, Lund, Sweden
    J Clin Psychopharmacol 32:608-14. 2012
  2. pmc The problem of confounding in studies of the effect of maternal drug use on pregnancy outcome
    Bengt Kallen
    Tornblad Institute, Lund University, 223 62 Lund, Sweden
    Obstet Gynecol Int 2012:148616. 2012
  3. doi request reprint Fetal safety of erythromycin. An update of Swedish data
    Bengt Kallen
    Tornblad Institute, Lund University, Biskopsgatan 7, 223 62, Lund, Sweden
    Eur J Clin Pharmacol 70:355-60. 2014
  4. ncbi request reprint Maternal and fetal factors which affect fetometry: use of in vitro fertilization and birth register data
    Bengt Kallen
    Tornblad Institute, University of Lund, Lund, Sweden Electronic address
    Eur J Obstet Gynecol Reprod Biol 170:372-6. 2013
  5. doi request reprint Association between preterm birth and intrauterine growth retardation and child asthma
    Bengt Kallen
    University of Lund, Lund, Sweden
    Eur Respir J 41:671-6. 2013
  6. doi request reprint Maternal drug use during pregnancy and asthma risk among children
    Bengt Kallen
    Tornblad Institute, University of Lund, Lund, Sweden
    Pediatr Allergy Immunol 24:28-32. 2013
  7. doi request reprint Vaccination against H1N1 influenza with Pandemrix(®) during pregnancy and delivery outcome: a Swedish register study
    B Kallen
    Tornblad Institute, University of Lund, Lund, Sweden
    BJOG 119:1583-90. 2012
  8. doi request reprint Asthma in Swedish children conceived by in vitro fertilisation
    Bengt Kallen
    Tornblad Institute, Lund University, Biskopsgatan 7, Lund SE 223 62, Sweden
    Arch Dis Child 98:92-6. 2013
  9. doi request reprint Maternal use of loperamide in early pregnancy and delivery outcome
    Bengt Kallen
    Tornblad Institute, University of Lund, Lund, Sweden
    Acta Paediatr 97:541-5. 2008
  10. doi request reprint Maternal use of selective serotonin re-uptake inhibitors and persistent pulmonary hypertension of the newborn
    Bengt Kallen
    Tornblad Institute, University of Lund, Lund, Sweden
    Pharmacoepidemiol Drug Saf 17:801-6. 2008

Detail Information

Publications51

  1. doi request reprint Neonatal complications after maternal concomitant use of SSRI and other central nervous system active drugs during the second or third trimester of pregnancy
    Bengt Kallen
    Tornblad Institute, University of Lund, Lund, Sweden
    J Clin Psychopharmacol 32:608-14. 2012
    ..Polypharmacy with CNS-active drugs during the later part of the pregnancy seems to increase the occurrence of neonatal morbidity but difference in nature or strength of underlying psychiatric pathology may confound the findings...
  2. pmc The problem of confounding in studies of the effect of maternal drug use on pregnancy outcome
    Bengt Kallen
    Tornblad Institute, Lund University, 223 62 Lund, Sweden
    Obstet Gynecol Int 2012:148616. 2012
    ..The most difficult problem to solve is often confounding by indication. The problem of confounding is less important for congenital malformations than for many other pregnancy outcomes...
  3. doi request reprint Fetal safety of erythromycin. An update of Swedish data
    Bengt Kallen
    Tornblad Institute, Lund University, Biskopsgatan 7, 223 62, Lund, Sweden
    Eur J Clin Pharmacol 70:355-60. 2014
    ..The present study was conducted to follow up on the previous observations and to find methodological explanations for the variation in results in these different published studies...
  4. ncbi request reprint Maternal and fetal factors which affect fetometry: use of in vitro fertilization and birth register data
    Bengt Kallen
    Tornblad Institute, University of Lund, Lund, Sweden Electronic address
    Eur J Obstet Gynecol Reprod Biol 170:372-6. 2013
    ..Dating pregnancies after in vitro fertilization can be used for the evaluation of fetometric studies and for studies of variables which may affect them...
  5. doi request reprint Association between preterm birth and intrauterine growth retardation and child asthma
    Bengt Kallen
    University of Lund, Lund, Sweden
    Eur Respir J 41:671-6. 2013
    ..We conclude that preterm birth is a stronger risk factor for childhood asthma than intrauterine growth disturbances; however, the latter also affects the risk, and is also seen in infants born at term...
  6. doi request reprint Maternal drug use during pregnancy and asthma risk among children
    Bengt Kallen
    Tornblad Institute, University of Lund, Lund, Sweden
    Pediatr Allergy Immunol 24:28-32. 2013
    ..We wanted to analyze these associations with consideration to the confounding of maternal asthma...
  7. doi request reprint Vaccination against H1N1 influenza with Pandemrix(®) during pregnancy and delivery outcome: a Swedish register study
    B Kallen
    Tornblad Institute, University of Lund, Lund, Sweden
    BJOG 119:1583-90. 2012
    ..To describe a large study on pregnancy outcome after vaccination against H1N1 during the 2009/10 pandemic...
  8. doi request reprint Asthma in Swedish children conceived by in vitro fertilisation
    Bengt Kallen
    Tornblad Institute, Lund University, Biskopsgatan 7, Lund SE 223 62, Sweden
    Arch Dis Child 98:92-6. 2013
    ..To investigate a proposed association between in vitro fertilisation (IVF) and child asthma...
  9. doi request reprint Maternal use of loperamide in early pregnancy and delivery outcome
    Bengt Kallen
    Tornblad Institute, University of Lund, Lund, Sweden
    Acta Paediatr 97:541-5. 2008
    ..To study delivery outcome including presence of infant congenital malformations after maternal use of loperamide in early pregnancy...
  10. doi request reprint Maternal use of selective serotonin re-uptake inhibitors and persistent pulmonary hypertension of the newborn
    Bengt Kallen
    Tornblad Institute, University of Lund, Lund, Sweden
    Pharmacoepidemiol Drug Saf 17:801-6. 2008
    ..The mechanism behind the association between SSRI and PPHN is unclear but an increased risk for respiratory problems after maternal use of SSRI is well known, and PPHN could be a rare part of this association...
  11. ncbi request reprint Congenital malformations in infants whose mothers reported the use of folic acid in early pregnancy in Sweden. A prospective population study
    Bengt Kallen
    Tornblad Institute, Lund University, Lund, Sweden
    Congenit Anom (Kyoto) 47:119-24. 2007
    ..A more complete ascertainment and detailed timing and dosage of folic acid use in a prospective study is recommended...
  12. ncbi request reprint The safety of antidepressant drugs during pregnancy
    Bengt Kallen
    University of Lund, Tornblad Institute, Biskopsgatan 7, Lund, Sweden
    Expert Opin Drug Saf 6:357-70. 2007
    ....
  13. ncbi request reprint Use of anti-asthmatic drugs during pregnancy. 3. Congenital malformations in the infants
    Bengt Kallen
    Tornblad Institute, University of Lund, Biskopsgatan 7, SE 223 62, Lund, Sweden
    Eur J Clin Pharmacol 63:383-8. 2007
    ..To study the risk for congenital malformations among infants whose mothers used anti-asthmatic drugs during pregnancy...
  14. ncbi request reprint Use of anti-asthmatic drugs during pregnancy. 1. Maternal characteristics, pregnancy and delivery complications
    Bengt Kallen
    Tornblad Institute, University of Lund, Biskopsgatan 7, 223 62, Lund, Sweden
    Eur J Clin Pharmacol 63:363-73. 2007
    ..To study, in a large cohort, the association between the use of anti-asthmatic drugs during pregnancy and pregnancy complications...
  15. doi request reprint Congenital malformations in infants born after in vitro fertilization in Sweden
    Bengt Kallen
    Tornblad Institute, University of Lund, Lund, Sweden
    Birth Defects Res A Clin Mol Teratol 88:137-43. 2010
    ..The risk for congenital malformations is increased in infants born after in vitro fertilization (IVF). Some specific malformations appear to be more affected than others...
  16. doi request reprint Blastocyst versus cleavage stage transfer in in vitro fertilization: differences in neonatal outcome?
    Bengt Kallen
    Tornblad Institute, University of Lund, Lund, Sweden
    Fertil Steril 94:1680-3. 2010
    ..To compare neonatal outcome of blastocyst and cleavage stage embryo transfers after IVF...
  17. doi request reprint Trends in delivery and neonatal outcome after in vitro fertilization in Sweden: data for 25 years
    B Kallen
    Tornblad Institute, University of Lund, Biskopsgatan 7, SE 223 62 Lund, Sweden
    Hum Reprod 25:1026-34. 2010
    ..Marked changes have occurred in in vitro fertilization (IVF) methodology during the past 25 years but also in characteristics of couples undergoing treatment...
  18. doi request reprint Cerebral palsy in children born after in vitro fertilization. Is the risk decreasing?
    A J Bengt Källén
    Tornblad Institute, University of Lund, Biskopsgatan 7, SE 223 62 Lund, Sweden
    Eur J Paediatr Neurol 14:526-30. 2010
    ..Infants born after in vitro fertilization (IVF) differ from spontaneously conceived infants in a number of aspects which could increase the risk for future cerebral palsy (CP), e.g., multiple births, preterm births, neonatal complications...
  19. doi request reprint Malignancies among women who gave birth after in vitro fertilization
    B Kallen
    Tornblad Institute, University of Lund, Lund, Sweden
    Hum Reprod 26:253-8. 2011
    ..Relatively few studies published to date have investigated IVF and cancer risk. In this study we compared the occurrence of cancer in women who gave birth after IVF with all other women who gave birth in the study period...
  20. doi request reprint Is there an increased risk for drug treated attention deficit/hyperactivity disorder in children born after in vitro fertilization?
    A J Bengt Källén
    Tornblad Institute, University of Lund, SE 223 62 Lund, Sweden
    Eur J Paediatr Neurol 15:247-53. 2011
    ..There is mounting evidence that children born after in vitro fertilization (IVF) run an increased risk of neurological complications and notably cerebral palsy. Whether developmental disturbances occur more often than expected is debated...
  21. doi request reprint Antidepressant use during pregnancy: comparison of data obtained from a prescription register and from antenatal care records
    Bengt Kallen
    Tornblad Institute, University of Lund, Biskopsgatan 7, 223 62, Lund, Sweden
    Eur J Clin Pharmacol 67:839-45. 2011
    ..To compare interview data on drug use during pregnancy with data identified from a register of prescriptions...
  22. doi request reprint Delivery outcome after maternal use of drugs for migraine: a register study in Sweden
    Bengt Kallen
    Tornblad Institute, University of Lund, Lund, Sweden
    Drug Saf 34:691-703. 2011
    ..The use of drugs for migraine during pregnancy may have adverse effects on delivery outcome, and warnings exist for such drugs regarding use during pregnancy. Most information in the literature concerns triptans...
  23. ncbi request reprint Use of anti-asthmatic drugs during pregnancy. 2. Infant characteristics excluding congenital malformations
    Bengt Kallen
    Tornblad Institute, University of Lund, Biskopsgatan 7, 223 62, Lund, Sweden
    Eur J Clin Pharmacol 63:375-81. 2007
    ..To study the characteristics of the infants born to women who have used anti-asthmatic drugs during pregnancy...
  24. ncbi request reprint Maternal use of selective serotonin re-uptake inhibitors in early pregnancy and infant congenital malformations
    Bengt A J Källén
    Tornblad Institute, University of Lund, Lund, Sweden
    Birth Defects Res A Clin Mol Teratol 79:301-8. 2007
    ..Maternal use of selective serotonin re-uptake inhibitors (SSRIs) has recently been associated with an increased risk for certain malformations...
  25. ncbi request reprint The safety of asthma medications during pregnancy
    Bengt Kallen
    Tornblad Institute, University of Lund, Biskopsgatan 7, SE 223 65 Lund, Sweden
    Expert Opin Drug Saf 6:15-26. 2007
    ..Further efforts should be made to isolate the possible specific effects of antiasthmatic drugs, notably for recent additions to the therapeutic arsenal...
  26. doi request reprint Maternal morbidity and mortality in in-vitro fertilization
    Bengt Kallen
    Centre for Reproduction Epidemiology, Tornblad Institute, University of Lund, Biskopsgatan 7, SE 223 62 Lund, Sweden
    Best Pract Res Clin Obstet Gynaecol 22:549-58. 2008
    ..However, an increased risk of placenta praevia might be to some extent due to the IVF procedure. No long-terms effects on cancer risk or mortality can be linked to the IVF procedure, although follow-up time is still relatively short...
  27. ncbi request reprint Pregnancy outcome after maternal organ transplantation in Sweden
    Bengt Kallen
    Tornblad Institute, University of Lund, Sweden
    BJOG 112:904-9. 2005
    ..To study pregnancy outcome before and after organ transplantation...
  28. doi request reprint Cancer risk in children and young adults conceived by in vitro fertilization
    Bengt Kallen
    Tornblad Institute, Lund, Sweden
    Pediatrics 126:270-6. 2010
    ..Studies conducted so far have found no statistically significant increased risk for cancer among children who are born after in vitro fertilization (IVF)...
  29. ncbi request reprint In vitro fertilisation in Sweden: obstetric characteristics, maternal morbidity and mortality
    Bengt Kallen
    Tornblad Institute, University of Lund, Lund, Sweden
    BJOG 112:1529-35. 2005
    ..To investigate obstetric characteristics, maternal morbidity and mortality among Swedish women giving birth after in vitro fertilisation (IVF) treatment...
  30. doi request reprint Ocular malformations or poor visual acuity in children born after in vitro fertilization in Sweden
    Kristina Tornqvist
    Department of Ophthalmology, University Hospital, Lund, Sweden
    Am J Ophthalmol 150:23-6. 2010
    ..To follow up children born after in vitro fertilization (IVF) with respect to eye malformations and poor visual acuity...
  31. ncbi request reprint Neonate characteristics after maternal use of antidepressants in late pregnancy
    Bengt Kallen
    Tornblad Institute, University of Lund, Lund, Sweden
    Arch Pediatr Adolesc Med 158:312-6. 2004
    ..Exposure to antidepressants during the third trimester of pregnancy has been associated with an increased risk for adverse birth outcomes, including preterm birth, respiratory distress, and hypoglycemia...
  32. ncbi request reprint Risk factors in term children for visual impairment without a known prenatal or postnatal cause
    Kristina Tornqvist
    Department of Ophthalmology, University of Lund, SE 221 85 Lund, Sweden
    Paediatr Perinat Epidemiol 18:425-30. 2004
    ....
  33. ncbi request reprint In vitro fertilization in Sweden: child morbidity including cancer risk
    Bengt Kallen
    Tornblad Institute, University of Lund, Lund, Sweden
    Fertil Steril 84:605-10. 2005
    ..To study long-term morbidity among children conceived by IVF...
  34. pmc Temporal trends in multiple births after in vitro fertilisation in Sweden, 1982-2001: a register study
    Bengt Kallen
    Centre for Reproduction Epidemiology, Tornblad Institute, University of Lund, Biskopsgatan 7, S 223 62 Lund, Sweden
    BMJ 331:382-3. 2005
  35. ncbi request reprint In vitro fertilization (IVF) in Sweden: infant outcome after different IVF fertilization methods
    Bengt Kallen
    Tornblad Institute, University of Lund, Lund, Sweden
    Fertil Steril 84:611-7. 2005
    ..To compare infant outcome after different IVF techniques...
  36. ncbi request reprint Delivery outcome after the use of meclozine in early pregnancy
    Bengt Kallen
    Tornblad Institute, University of Lund, Lund, Sweden
    Eur J Epidemiol 18:665-9. 2003
    ..If anything, delivery outcome is better than expected when the mother used meclozine. These beneficial effects are probably secondary to NVP. Meclozine can apparently be used without risk at this condition...
  37. ncbi request reprint In vitro fertilization in Sweden: maternal characteristics
    Bengt Kallen
    Tornblad Institute, University of Lund, Biskopsgatan 7, SE 223 62 Lund, Sweden
    Acta Obstet Gynecol Scand 84:1185-91. 2005
    ..Deliveries among women who had an in vitro fertilization (IVF) are characterized by increased risks for both the mother and the infant/child. Part of these effects may be due to maternal characteristics...
  38. ncbi request reprint Maternal drug use and infant cleft lip/palate with special reference to corticoids
    Bengt Kallen
    Tornblad Institute, University of Lund, Sweden
    Cleft Palate Craniofac J 40:624-8. 2003
    ..To study the association between maternal drug use in early pregnancy and orofacial cleft in the infant...
  39. ncbi request reprint In vitro fertilization (IVF) in Sweden: risk for congenital malformations after different IVF methods
    Bengt Kallen
    Tornblad Institute, University of Lund, Biskopsgatan 7, SE 223 62 Lund, Sweden
    Birth Defects Res A Clin Mol Teratol 73:162-9. 2005
    ..This population based study is aimed at analyzing the presence of congenital malformations in a large group of infants born after IVF and to compare malformation risk both with that of all infants born and according to IVF method used...
  40. ncbi request reprint Reproductive outcomes among hairdressers
    Lars Rylander
    Department of Occupational and Environmental Medicine, Institute of Laboratory Medicine, University of Lund, University Hospital, SE 221 85 Lund, Sweden
    Scand J Work Environ Health 31:212-7. 2005
    ..The present study aimed at examining the possible risk of working as a hairdresser during pregnancy in relation to reproductive outcomes...
  41. ncbi request reprint The incidence of spina bifida in Sweden 1973-2003: the effect of prenatal diagnosis
    Annamari Nikkilä
    Department of Obstetrics and Gynaecology, University Hospital, Lund, Sweden
    Eur J Public Health 16:660-2. 2006
    ..These studies were mostly hospital-based or, sometimes, multicentre studies. We present here a population-based study of the prenatal diagnosis of spina bifida in Sweden over a period of 31 years...
  42. ncbi request reprint The use of national health registers for studying environmental causes of congenital defects
    Bengt Kallen
    Centre of Reproduction Epidemiology, Tornblad Institute, University of Lund, Lund, Sweden
    Rev Environ Health 20:57-64. 2005
    ..The review stresses the usefulness of this approach but also the inherent problems of which the researcher must be fully aware...
  43. ncbi request reprint Optic nerve hypoplasia: Risk factors and epidemiology
    Kristina Tornqvist
    Department of Ophthalmology, University Hospital of Lund, Lund, Sweden
    Acta Ophthalmol Scand 80:300-4. 2002
    ..To study the epidemiology of optic nerve hypoplasia...
  44. ncbi request reprint Relationship between vitamin use, smoking, and nausea and vomiting of pregnancy
    Bengt Kallen
    Tornblad Institute, University of Lund, Lund, Sweden
    Acta Obstet Gynecol Scand 82:916-20. 2003
    ..Nausea and vomiting in pregnancy (NVP) is a common complaint but risk factors for NVP are not well characterized...
  45. ncbi request reprint Use of folic acid supplementation and risk for dizygotic twinning
    Bengt Kallen
    Tornblad Institute, University of Lund, Biskopsgatan 7, SE 223 62 Lund, Sweden
    Early Hum Dev 80:143-51. 2004
    ..An increase in dizygotic twinning rate after folic acid supplementation has previously been described, but in a recent study from China, no such effect was seen...
  46. ncbi request reprint Prenatal diagnosis of congenital heart defects - a population based study
    Annamari Nikkilä
    Department of Obstetrics and Gynaecology, University Hospital Lund, Sweden
    Acta Paediatr 96:49-52. 2007
    ..The aim of this study was to describe the efficiency of routine prenatal ultrasound screening for the detection of cardiac defects in a Swedish region and to study the effect of prenatal diagnosis on the survival and outcome of the child...
  47. ncbi request reprint Maternal drug use, fertility problems, and infant craniostenosis
    Bengt Kallen
    Tornblad Institute, University of Lund, Lund, Sweden
    Cleft Palate Craniofac J 42:589-93. 2005
    ..To test the hypothesis that maternal drug use or treatment for infertility is related to the occurrence of infant craniostenosis...
  48. ncbi request reprint The epidemiology of anophthalmia and microphthalmia in Sweden
    Bengt Kallen
    Tornblad Institute, University of Lund, Lund, Sweden
    Eur J Epidemiol 20:345-50. 2005
    ..Maternal smoking in early pregnancy seemed to increase the risk for anophthalmia or microphthalmia in the absence of a coloboma...
  49. ncbi request reprint Relation between oculo-auriculo-vertebral (OAV) dysplasia and three other non-random associations of malformations (VATER, CHARGE, and OEIS)
    Karin Kallen
    Tornblad Institute, University of Lund, Biskopsgatan 7, 223 62 Lund, Sweden
    Am J Med Genet A 127:26-34. 2004
    ..An association between two conditions indicates similarities in pathogenesis or in etiology. We suggest that the connection between OAV and CHARGE could be related to a common pathogenetic mechanism: disturbed neural crest development...
  50. ncbi request reprint Valproic acid is known to cause hypospadias in man but does not reduce anogenital distance or causes hypospadias in rats
    Bengt Kallen
    Tornblad Institute, University of Lund, Lund, Sweden
    Basic Clin Pharmacol Toxicol 94:51-4. 2004
    ..The mechanism through which valproic acid causes hypospadias in man and affects testicular development in rat is unknown. Hypospadias caused by valproic acid in man is apparently not due to anti-androgenic properties of the drug...