Please select the eligibility criteria that correspond to the clinical trial below.
Title: Vitamin D Supplementation During Pregnancy for Prevention of Asthma in Childhood: An Interventional Trial in the ABC (Asthma Begins in Childhood) Cohort
Brief Summary: The aim of this study is to prevent asthma symptoms (recurrent wheeze) in childhood by supplementation with high dose vitamin D to the mother during pregnancy. Participants are mothers and children of the ABC (Asthma Begins in Childhood) cohort. Mothers are recruited during pregnancy and receive daily supplement with 2400 IU of Vitamin D3 or placebo from week 24 og gestation to 1 week after delivery. In addition all mothers are advised to take the recommended dose of 400 IU vitamin D daily. The mothers in ABC also participate in an interventional trial with fish oil supplementation, and the vitamin D randomization is stratified by fish oil treatment group. The child is followed with acute and planned vits at the research unit, and wheeze is diagnosed according to predefined algorithms.


Options:
A: Inclusion Criteria:

1. Women who are within the ages of 16-45 years
2. In good general health
3. Less than 12 weeks pregnant (based on last menstrual period)

Exclusion Criteria:

1. Mothers with preexisting type I or type II diabetes
2. Mothers with preexisting hypertension
3. Mothers with preexisting parathyroid disease or uncontrolled thyroid disease
4. Mothers with multiple fetuses (e.g., twins, triplets, etc.)
B: Inclusion Criteria:

Mother:

* Pregnant in week 22-26 of gestation
* Participating in the ABC-cohort
* Living in Sealand, Denmark
* Fluent in Danish
* Willing to let the child participate in the study

Exclusion Criteria:

Mother:

* Intake of more than 400 IU of vitamin D during the last 6 months
* Endocrinological disease such as calcium metabolic disorder, parathyroid disorder, thyroid disorder or Diabetes type 1
* Tuberculosis
* Sarcoidosis
* In need of diuretics or heart medication including calcium channel blockers
C: Inclusion Criteria:

* Pregnant women attending antenatal clinic at ≤ 20 weeks of gestation
* Normoglycemic, normotensive at the time of antenatal booking

Exclusion Criteria:

* Multiple pregnancy
* H/O hypertensive disorders in previous pregnancy
* Known diabetic or h/o gestational diabetes in previous pregnancy
* H/O endocrine disorders ( thyroid, parathyroid dysfunction)
* Chronic renal diseases
* Tuberculosis
* Breast feeding (current)
D: Inclusion Criteria:

* Personal history of asthma, eczema, allergic rhinitis or a history of asthma, eczema, allergic rhinitis in the biological father of the child
* Gestational age between 10 and 18 weeks at the time of randomization
* Maternal age between 18 and 39 years
* Not a current smoker
* English or Spanish speaking
* Intent to participate for the full 4 years (through Pregnancy and then until the 3rd birthday of the child)

Exclusion Criteria:

* Not meeting inclusion criteria
* Gestational age greater than 18 weeks
* Presence of chronic medical conditions
* Taking vitamin D supplements containing more than 2000 IU/day of vitamin D3
* Multiple gestation pregnancy (twins, triplets)
* Pregnancy achieved by assisted reproduction techniques (e.g., IUI, IVF)

Answer: B