Objective: To examine the effect of vitamin D supplements on the pregnancy and clinical
pregnancy rate in embryo transfer cycles.
Design: Experimental study with a pre- and post-test. Setting: In Vitro Fertilization Center
Patients: Its sample consisted of 118 women, 58 in the experimental group and 60 in the
control group.
Intervention(s): At the beginning of the infertility treatment, the experimental group took
vitamin D supplements, and the control group did not. Vitamin D supplementation for infertile
women includes regulation of a diet rich in vitamin D, educational and motivational
interviews about insolation, and taking vitamin D orally.
Main Outcome Measure(s): 25(OH)D and beta HCG levels