Research Topics
| Bengt KallenSummaryAffiliation: Lund University Country: Sweden Publications
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Detail Information
Publications
Association between preterm birth and intrauterine growth retardation and child asthmaBengt 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...- Maternal drug use during pregnancy and asthma risk among childrenBengt 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... - Vaccination against H1N1 influenza with Pandemrix(®) during pregnancy and delivery outcome: a Swedish register studyB 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... - Asthma in Swedish children conceived by in vitro fertilisationBengt 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... - Neonatal complications after maternal concomitant use of SSRI and other central nervous system active drugs during the second or third trimester of pregnancyBengt 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... - 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... - Maternal use of selective serotonin re-uptake inhibitors and persistent pulmonary hypertension of the newbornBengt 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... 
The safety of antidepressant drugs during pregnancyBengt Kallen
University of Lund, Tornblad Institute, Biskopsgatan 7, Lund, Sweden
Expert Opin Drug Saf 6:357-70. 2007....- Use of anti-asthmatic drugs during pregnancy. 3. Congenital malformations in the infantsBengt 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... - Use of anti-asthmatic drugs during pregnancy. 1. Maternal characteristics, pregnancy and delivery complicationsBengt 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... - Use of anti-asthmatic drugs during pregnancy. 2. Infant characteristics excluding congenital malformationsBengt 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... - Maternal use of selective serotonin re-uptake inhibitors in early pregnancy and infant congenital malformationsBengt 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... - Maternal use of loperamide in early pregnancy and delivery outcomeBengt 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... - Maternal morbidity and mortality in in-vitro fertilizationBengt 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... - Congenital malformations in infants born after in vitro fertilization in SwedenBengt 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... - 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... - Trends in delivery and neonatal outcome after in vitro fertilization in Sweden: data for 25 yearsB 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... - Malignancies among women who gave birth after in vitro fertilizationB 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... - 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... - Antidepressant use during pregnancy: comparison of data obtained from a prescription register and from antenatal care recordsBengt 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... - The safety of asthma medications during pregnancyBengt 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... - Congenital malformations in infants whose mothers reported the use of folic acid in early pregnancy in Sweden. A prospective population studyBengt 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... - Delivery outcome after maternal use of drugs for migraine: a register study in SwedenBengt 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... - Pregnancy outcome after maternal organ transplantation in SwedenBengt Kallen
Tornblad Institute, University of Lund, Sweden
BJOG 112:904-9. 2005..To study pregnancy outcome before and after organ transplantation... - In vitro fertilisation in Sweden: obstetric characteristics, maternal morbidity and mortalityBengt 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... - Cancer risk in children and young adults conceived by in vitro fertilizationBengt 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)... - Ocular malformations or poor visual acuity in children born after in vitro fertilization in SwedenKristina 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... - Neonate characteristics after maternal use of antidepressants in late pregnancyBengt 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... 
Temporal trends in multiple births after in vitro fertilisation in Sweden, 1982-2001: a register studyBengt Kallen
Centre for Reproduction Epidemiology, Tornblad Institute, University of Lund, Biskopsgatan 7, S 223 62 Lund, Sweden
BMJ 331:382-3. 2005- In vitro fertilization (IVF) in Sweden: infant outcome after different IVF fertilization methodsBengt Kallen
Tornblad Institute, University of Lund, Lund, Sweden
Fertil Steril 84:611-7. 2005..To compare infant outcome after different IVF techniques... - In vitro fertilization in Sweden: child morbidity including cancer riskBengt Kallen
Tornblad Institute, University of Lund, Lund, Sweden
Fertil Steril 84:605-10. 2005..To study long-term morbidity among children conceived by IVF... - Risk factors in term children for visual impairment without a known prenatal or postnatal causeKristina Tornqvist
Department of Ophthalmology, University of Lund, SE 221 85 Lund, Sweden
Paediatr Perinat Epidemiol 18:425-30. 2004.... - In vitro fertilization in Sweden: maternal characteristicsBengt 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... - Delivery outcome after the use of meclozine in early pregnancyBengt 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... - Maternal drug use and infant cleft lip/palate with special reference to corticoidsBengt 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... - In vitro fertilization (IVF) in Sweden: risk for congenital malformations after different IVF methodsBengt 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... - Reproductive outcomes among hairdressersLars 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... - The use of national health registers for studying environmental causes of congenital defectsBengt 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... - The incidence of spina bifida in Sweden 1973-2003: the effect of prenatal diagnosisAnnamari 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... - Use of folic acid supplementation and risk for dizygotic twinningBengt 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... - Optic nerve hypoplasia: Risk factors and epidemiologyKristina 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... - Relationship between vitamin use, smoking, and nausea and vomiting of pregnancyBengt 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... - Prenatal diagnosis of congenital heart defects - a population based studyAnnamari 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... - The epidemiology of anophthalmia and microphthalmia in SwedenBengt 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... - Maternal drug use, fertility problems, and infant craniostenosisBengt Kallen
Tornblad Institute, University of Lund, Lund, Sweden
Cleft Palate Craniofac J 42:589-93. 2005..In order to validate some findings, data from the Central-East France Registry were studied for first trimester drug exposure in 235 infants, and use of ovarian stimulation in 315 infants with craniostenosis... - 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... - Valproic acid is known to cause hypospadias in man but does not reduce anogenital distance or causes hypospadias in ratsBengt 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...