1.2. Analysis.
Comparison 1 Calcium supplementation versus placebo or no treatment (maternal outcomes), Outcome 2 Preterm birth (a) Birth prior to 37 weeks by dose of calcium.
Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.