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Table 2 Inclusion and exclusion criteria

From: Assessment of DHA on reducing early preterm birth: the ADORE randomized controlled trial protocol

Inclusion criteria
1. Pregnant females 18.0 years and older 12 to 20 weeks of gestation at study entry
2. Agree to consume study capsules and a typical prenatal supplement of 200 mg DHA
3. Available by telephone
4. English or Spanish speaking
Exclusion criteria
1. Less than 18 years of age
2. Expecting multiple infants
3. Gestational age at baseline <12 weeks or >20 weeks
4. Unable or unwilling to agree to consume capsules until delivery
5. Unwilling to discontinue use of another prenatal supplement with DHA
6. Women with allergy to any component of DHA product (including algae), soybean oil or corn oil