The goal of this prospective cohort study is to learn about the overall and seasonal prevalence of vitamin D insufficiency and its determinants in a population of women with infertility who will go through in vitro fertilization in Sweden. The main questions it aims to answer are: * What is the prevalence of vitamin D insufficiency? * What are the determinants of this insufficiency? Participants will be asked to complete a questionnaire validated for dietary assessment of vitamin D intake and sun exposure habits and they will leave a blood sample for measurement of 25(OH)D concentration. Researchers will compare the in vitro fertilization outcomes between women with vitamin D insufficiency and sufficiency to see if there is any difference.
Study Type
OBSERVATIONAL
Enrollment
265
Department of Obstetrics and Gynecology, Sahlgrenska University Hospital
Gothenburg, Sweden
Prevalence of vitamin D insufficiency
Overall and seasonal prevalence of vitamin D insufficiency
Time frame: September 2020 - August 2021
Determinants of vitamin D insufficiency
Determinants (dietary, sun exposure habits) of vitamin D insufficiency
Time frame: September 2020 - August 2021
In vitro fertilization outcomes
Pregnancy outcomes (biochemical pregnancy, clinical pregnancy, miscarriage, live birth) after in vitro fertilization between women with and without vitamin D insufficiency.
Time frame: September 2020 - August 2021
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