Single Dose of Antenatal Corticosteroids for Pregnancies at Risk of Preterm Delivery (SNACS)

Summary

Antenatal corticosteroids (ACS) reduce the risks of neonatal death and morbidities in preterm infants, such as respiratory distress syndrome. The standard of care for pregnant people at risk of preterm birth includes 2 doses of Celestone (for a total of 24 mg in Canada, or 22.8 mg in Australia) to accelerate fetal lung maturity. The investigators plan to conduct a randomized controlled trial to determine whether half the usual dose (12 mg in Canada, or 11.4 mg in Australia) of Celestone is non-inferior to the standard double doses.

Eligibility

Inclusion Criteria:

1. Pregnant people, aged 18 to 55 years old, at risk of preterm birth with a singleton or twins between 22 weeks and 0 days and \<34 weeks and 6 days gestation who have received only a single dose of Celestone within 24 hours
2. Capable of giving informed, written consent.

Exclusion Criteria:

1. Contraindication to corticosteroids
2. Systemic corticosteroids for medical conditions during the pregnancy (e.g. lupus, severe asthma, Covid, etc).
3. Previous participation in this trial (in a previous pregnancy)
4. Known severe/life-threatening fetal or pregnant patient condition (e.g. fetal congenital/chromosomal abnormality)
5. Demise of one or more fetuses after 14 weeks and 0 days

Conditions6

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