Vitamin D status in women with history of infertility and decreased fecundability: A population-based study

Johanna Lumme: Päivikki and Sakari Sohlberg Foundation, the Health and Biosciences Doctoral Programme, HBS-DP (UniOGS, University of Oulu) and the Scholarship Fund of the University of Oulu. Maarit Niinimäki, Marja Ojaniemi: University Hospital of Oulu and PEDEGO Research Unit, University of Oulu Research Funds. Karl-Heinz Herzig: H2020-633595 Dynahealth. Sylvain Sebert, Marjo-Riitta Järvelin: H2020-733206 LifeCycle. Marjo-Riitta Järvelin: Academy of Finland grant numbers 24300796, 24302031, 285547 (EGEA); H2020-643774 iHealth-T2D, H2020-825762 EDCMET and Medical Research Council Biotechnology and Biological Sciences Research Council PREcisE (Nutrition and Epigenome), The Joint Programming Initiative a Healthy Diet for a Healthy Life (JPI HDHL/EU-H2020).

NFBC1966 data is available from the University of Oulu, Infrastructure for Population Studies. Permission to use the data can be applied for research purposes via an electronic material request portal. In the use of data, we follow the EU general data protection regulation (679/2016) and Finnish Data Protection Act. The use of personal data is based on cohort participant’s written informed consent at his/her latest follow-up study, which may cause limitations to its use. Please contact NFBC project center (NFBCprojectcenter@oulu.fi) and visit the cohort website (https://www.oulu.fi/en/university/faculties-and-units/faculty-medicine/northern-finland-birth-cohorts-and-arctic-biobank accessed on 18 March 2019) for more information.