The Cochrane review of studies comparing vitamin D supplementation alone with no supplement found a reduced risk of low birth weight (RR 0.4; 95%CI 0.24 to 0.67; moderate quality), a possible increase in infant length (mean difference [MD] 0.70, 95%CI –0.02 to 1.43) and head circumference (MD 0.43, 95%CI 0.03 to 0.83) and no clear difference in rates of caesarean section (RR 0.95; 95%CI 0.69 to 1.31), stillbirths (RR 0.35; 95%CI 0.06 to 1.99) or neonatal deaths (RR 0.27; 95%CI 0.04 to 1.67) (De-Regil et al 2016). Another systematic review found that the evidence to support a relationship between maternal vitamin D status and birth weight is limited by its observational nature (Harvey et al 2014). A later RCT found no clear differences in birth weight (p=0.88), length (p=0.94), head circumference (p=0.13) or mode of birth (p=0.26) among newborns of women receiving vitamin D plus calcium and those receiving no intervention (Asemi et al 2016).
57.In women considered to be at risk of vitamin D deficiency, advise vitamin D supplementation for women with vitamin D levels lower than 50 nmol/L.
57.1.1Practice summary — vitamin D status
When — In the antenatal period
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Who — Midwife; GP; obstetrician; Aboriginal and Torres Strait Islander health worker; multicultural health worker; pharmacist
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Take a holistic approach — Give women advice on the risks and benefits of sun exposure (see Section 57.1.2; Resources) and the dietary sources of vitamin D (dairy products, eggs and fish), taking cultural considerations into account.
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Document and follow-up — If a woman’s vitamin D deficiency status is tested, note the results in her record. Have a system in place so that women who are found to be deficient in vitamin D are given ongoing follow-up and information about supplementation.
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57.1.2Resources
Australian and New Zealand Bone and Mineral Society, the Australasian College of Dermatologists, Cancer Council Australia, Endocrine Society of Australia and Osteoporosis Australia (2016) Risks and Benefits of Sun Exposure.
NHMRC (2006) Nutrient Reference Values for Australia and New Zealand. Canberra: National Health and Medical Research Council.
57.1.3References
ABS (2014a) 4727.0.55.003 - Australian Aboriginal and Torres Strait Islander Health Survey: Biomedical Results, 2012-13. Canberra: Australian Bureau of Statistics.
ABS (2014b) 4364.0.55.006 - Australian Health Survey: Biomedical Results for Nutrients, 2011-12. Canberra: Australian Bureau of Statistics.
ACOG (2011) ACOG Committee Opinion No. 495: Vitamin D: Screening and supplementation during pregnancy. Obstet Gynecol 118(1): 197-8.
Asemi Z, Samimi M, Siavashani MA et al (2016) Calcium-Vitamin D Co-supplementation Affects Metabolic Profiles, but not Pregnancy Outcomes, in Healthy Pregnant Women. Int J Prev Med 7: 49.
Bartoszewicz Z, Kondracka A, Krasnodębska-Kiljańska M et al (2013) Vitamin D insufficiency in healthy pregnancy women living in Warsaw. Ginekol Pol 84: 363–67.
Bendall A, de Costa C, Woods C et al (2012) Vitamin D levels in pregnant women booking for antenatal care in Far North Queensland. Aust N Z J Obstet Gynaecol 52(4): 391-4.
Binks MJ, Smith-Vaughan HC, Marsh R et al (2016) Cord blood vitamin D and the risk of acute lower respiratory infection in Indigenous infants in the Northern Territory. Med J Aust 204(6): 238.
Bomba-Opon DA, Brawura-Biskupski-Samaha R, Kozlowski S et al (2014) First trimester maternal serum vitamin D and markers of preeclampsia. J Matern Fetal Neonatal Med 27(10): 1078-9.
Brough L, Rees GA, Crawford MA et al (2010) Effect of multiple-micronutrient supplementation on maternal nutrient status, infant birth weight and gestational age at birth in a low-income, multi-ethnic population. Br J Nutr 104(3): 437-45.
Burris HH, Rifas-Shiman SL, Kleinman K et al (2012) Vitamin D deficiency in pregnancy and gestational diabetes mellitus. Am J Obstet Gynecol 207(3): 182 e1-8.
Burris HH, Thomas A, Zera CA et al (2015) Prenatal vitamin use and vitamin D status during pregnancy, differences by race and overweight status. J Perinatol 35(4): 241-5.
Cooper C, Harvey NC, Bishop NJ et al (2016) Maternal gestational vitamin D supplementation and offspring bone health (MAVIDOS): a multicentre, double-blind, randomised placebo-controlled trial. The Lancet Diabetes & Endocrinology 4(5): 393-402.
Dahlman I, Gerdhem P, Bergstrom I (2013) Vitamin D status and bone health in immigrant versus Swedish women during pregnancy and the post-partum period. J Musculoskelet Neoronal Interact 13(4): 464–69.
Davies-Tuck M, Yim C, Knight M et al (2015) Vitamin D testing in pregnancy: Does one size fit all? Aust N Z J Obstet Gynaecol 55(2): 149-55.
Dawodu A, Saadi HF, Bekdache G et al (2013) Randomized controlled trial (RCT) of vitamin D supplementation in pregnancy in a population with endemic vitamin D deficiency. J Clin Endocrinol Metab 98(6): 2337-46.
De Laine KM, Matthews G, Grivell RM (2013) Prospective audit of vitamin D levels of women presenting for their first antenatal visit at a tertiary centre. Aust N Z J Obstet Gynaecol 53(4): 353-7.
De-Regil LM, Palacios C, Lombardo LK et al (2016) Vitamin D supplementation for women during pregnancy. Cochrane Database Syst Rev 1: CD008873.
Diogenes ME, Bezerra FF, Rezende EP et al (2015) Calcium Plus Vitamin D Supplementation During the Third Trimester of Pregnancy in Adolescents Accustomed to Low Calcium Diets Does Not Affect Infant Bone Mass at Early Lactation in a Randomized Controlled Trial. J Nutr 145(7): 1515-23.
Gibson-Helm M, Teede H, Block A et al (2014) Maternal health and pregnancy outcomes among women of refugee background from African countries: a retrospective, observational study in Australia. BMC Pregnancy Childbirth 14: 392.
Gibson-Helm M, Boyle J, Cheng IH et al (2015) Maternal health and pregnancy outcomes among women of refugee background from Asian countries. Int J Gynaecol Obstet 129(2): 146-51.
Gidlof S, Silva AT, Gustafsson S et al (2015) Vitamin D and the risk of preeclampsia--a nested case-control study. Acta Obstet Gynecol Scand 94(8): 904-8.
Harvey NC, Holroyd C, Ntani G et al (2014) Vitamin D supplementation in pregnancy: a systematic review. Health Technol Assess 18(45): 1-190.
Johnson DD, Wagner CL, Hulsey TC et al (2011) Vitamin D deficiency and insufficiency is common during pregnancy. Am J Perinatol 28(1): 7-12.
Karlsson T, Andersson L, Hussain A et al (2015) Lower vitamin D status in obese compared with normal-weight women despite higher vitamin D intake in early pregnancy. Clin Nutr 34(5): 892-8.
Leffelaar ER, Vrijkotte TG, van Eijsden M (2010) Maternal early pregnancy vitamin D status in relation to fetal and neonatal growth: results of the multi-ethnic Amsterdam Born Children and their Development cohort. Br J Nutr 104(1): 108-17.
Lehotay DC, Smith P, Krahn J et al (2013) Vitamin D levels and relative insufficiency in Saskatchewan. Clin Biochem 46(15): 1489-92.
Luque-Fernandez MA, Gelaye B, VanderWeele T et al (2014) Seasonal variation of 25-hydroxyvitamin D among non-Hispanic black and white pregnant women from three US pregnancy cohorts. Paediatr Perinat Epidemiol 28(2): 166-76.
March KM, Chen NN, Karakochuk CD et al (2015) Maternal vitamin D(3) supplementation at 50 mug/d protects against low serum 25-hydroxyvitamin D in infants at 8 wk of age: a randomized controlled trial of 3 doses of vitamin D beginning in gestation and continued in lactation. Am J Clin Nutr 102(2): 402-10.
McAree T, Jacobs B, Manickavasagar T et al (2013) Vitamin D deficiency in pregnancy - still a public health issue. Matern Child Nutr 9(1): 23-30.
McLeod DS, Warner JV, Henman M et al (2012) Associations of serum vitamin D concentrations with obstetric glucose metabolism in a subset of the Hyperglycemia and Adverse Pregnancy Outcome (HAPO) study cohort. Diabet Med 29(8): e199-204.
Morales E, Rodriguez A, Valvi D et al (2015) Deficit of vitamin D in pregnancy and growth and overweight in the offspring. int J Obesity 39: 61–68.
Mutlu GY, Ozsu E, Kalaca S et al (2014) Evaluation of vitamin D supplementation doses during pregnancy in a population at high risk for deficiency. Horm Res Paediatr 81(6): 402-8.
NICE (updated 2016) Antenatal Care for Uncomplicated Pregnancies. London: National Institute of Health and Clinical Excellence.
Nowson CA, McGrath JJ, Ebeling PR et al (2012) Vitamin D and health in adults in Australia and New Zealand: a position statement. Med J Aust 196(11): 686-7.
NZ MoH (2013) Companion Statement on Vitamin D and Sun Exposure in Pregnancy and Infancy in New Zealand. Wellington: Ministry of Health.
Ozias MK, Kerling EH, Christifano DN et al (2014) Typical prenatal vitamin D supplement intake does not prevent decrease of plasma 25-hydroxyvitamin D at birth. J Am Coll Nutr 33(5): 394-9.
Paxton GA, Teale GR, Nowson CA et al (2013) Vitamin D and health in pregnancy, infants, children and adolescents in Australia and New Zealand: a position statement. Med J Aust 198(3): 142-3.
Perampalam S, Ganda K, Chow KA et al (2011) Vitamin D status and its predictive factors in pregnancy in 2 Australian populations. Aust N Z J Obstet Gynaecol 51(4): 353-9.
Perumal N, Al Mahmud A, Baqui AH et al (2015) Prenatal vitamin D supplementation and infant vitamin D status in Bangladesh. Public Health Nutr: 1-9.
RANZCOG (2015) Vitamin and Mineral Supplementation and Pregnancy. Melbourne: Royal Australian and New Zealand College of Obstetricians and Gynaecologists.
Rodda CP, Benson JE, Vincent AJ et al (2015) Maternal vitamin D supplementation during pregnancy prevents vitamin D deficiency in the newborn: an open-label randomized controlled trial. Clin Endocrinol (Oxf) 83(3): 363-8.
Schneuer FJ, Roberts CL, Guilbert C et al (2014) Effects of maternal serum 25-hydroxyvitamin D concentrations in the first trimester on subsequent pregnancy outcomes in an Australian population. Am J Clin Nutr 99(2): 287-95.
Teale GR & Cunningham CE (2010) Vitamin D deficiency is common among pregnant women in rural Victoria. Aust N Z J Obstet Gynaecol 50(3): 259-61.
Wagner CL, McNeil RB, Johnson DD et al (2013) Health characteristics and outcomes of two randomized vitamin D supplementation trials during pregnancy: a combined analysis. J Steroid Biochem Mol Biol 136: 313-20.
Wall CR, Stewart AW, Camargo CA, Jr. et al (2016) Vitamin D activity of breast milk in women randomly assigned to vitamin D3 supplementation during pregnancy. Am J Clin Nutr 103(2): 382-8.
Willix C, Rasmussen S, Evans S et al (2015) A comparison of vitamin D levels in two antenatal populations in regional Western Australia. Aust Fam Phys 44(3): 141–44.
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