Response to Comment on: Sørensen et al. Maternal Serum Levels of 25-Hydroxy-Vitamin D During Pregnancy and Risk of Type 1 Diabetes in the Offspring. Diabetes 2012;61:175–178

  1. Lars C. Stene4
  1. 1Department of Pediatrics, Oslo University Hospital Ullevål, Oslo, Norway
  2. 2Department of Health Management and Health Economics, Institute of Health and Society, University of Oslo, Oslo, Norway
  3. 3Hormone Laboratory, Oslo University Hospital Aker, Oslo, Norway
  4. 4Norwegian Institute of Public Health, Oslo, Norway
  1. Corresponding author: Ingvild M. Sørensen, i.m.sorensen{at}

We appreciate the interest of Niinistö et al. (1) in our study on maternal serum levels of 25-hydroxy-vitamin D [25(OH)D] during pregnancy and risk of type 1 diabetes in the offspring (2). We analyzed 25(OH)D in serum samples from pregnant women mainly from the last trimester and found an association between lower maternal serum concentrations of 25(OH)D during pregnancy and increased risk of type 1 diabetes development in childhood. Niinistö et al. point out that intake of polyunsaturated n-3 fatty acids, as in cod liver oil, which is frequently used in Norway, …

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