Zahiri 2010.

Trial name or title	Assessment of the effect of zinc supplementation on adverse outcomes of pregnancy.
Methods	Randomised controlled trial.
Participants	Inclusion criteria: gestational age of 12‐16 weeks based on reliable LMP or first trimester ultrasound, lack of history of high‐risk pregnancy, lack of chronic underlying diseases (such as heart disease, HTN, DM). Exclusion criteria: lack of complete treatment or lack of follow‐up.
Interventions	Zinc 30 mg from 12th week of gestation every other day in the intervention group and no zinc is supplemented in the control group.
Outcomes	Gestation, birthweight and other pregnancy and neonatal clinical outcomes.
Starting date	March 2009.
Contact information	Dr Ziba Zahiri (drzibazahiri@gums.ac.ir).
Notes

DM: diabetes mellitus
 HTN: hypertension
 LMP: last menstrual period