Iodine Status in Pregnant Women and Their Newborns: is Congenital Hypothyroidism Related to Iodine Deficiency in Pregnancy?

Pregnancy Clinical Trial

Clinical Trial Details — Status: Recruiting

Administrative data

• NCT number: NCT00505479
• Other study ID #: G20020584
• Status: Recruiting
• Phase: N/A
• First received: July 20, 2007
• Last updated: July 20, 2007
• Start date: May 2007
• Est. completion date: May 2010

Study information

• Verified date: July 2007
• Source: Zhejiang University
• Contact: Zhengyan Zhao, M.D.
• Phone: 008657187061007
• Email: zhaozy[@]zju.edu.cn
• Is FDA regulated: No
• Health authority: China: Ministry of Health
• Study type: Observational

Clinical Trial Summary

Iodine is an essential component of thyroid hormone, which is necessary for many metabolic processes as well as the maturation of the CNS. Deficiencies of iodine have deleterious effects on both pregnant women and infants. The iodine status of the population after implementation of the universal salt iodization program in Zhejiang province has not been known. This study was to determine whether pregnant women show evidence of iodine deficiency, and to examine the correlation between maternal urine iodine concentration and newborn thyroid function.

Description:

Iodine is an essential component of thyroid hormone, which is necessary for many metabolic processes as well as the maturation of the CNS. Deficiencies of iodine have deleterious effects on both pregnant women and infants. The iodine status of the population after implementation of the universal salt iodization program in Zhejiang province has not been known. This study was to determine whether pregnant women show evidence of iodine deficiency, and to examine the correlation between maternal urine iodine concentration and newborn thyroid function.

Healthy women at 12 weeks’ gestation and over from four different areas in Zhejiang province were enrolled to participate this program from May 2007 to May 2010. Women consented to provide urine samples and salt samples during pregnancy (12, 16, 24 weeks’ gestation and before delivery), and give permission to access their newborn’s TSH value. Urinary iodine concentration (UIC) was determined by ammonium persulfate digestion microplate method, and TSH was determined by a time resolved fluoro-immunoassay (TRFIA). The diagnostic standard for congenital hypothyroidism was: TSH ≥ 20 mU/L and declined FT4 levels. Compare the correlation to effects with different level of iodine content in salt, maternal UIC and neonatal TSH. Investigate the optimal level of iodine content in salt in different areas in ZheJiang province.

Recruitment information / eligibility

• Status: Recruiting
• Enrollment: 0
• Est. completion date: May 2010
• Accepts healthy volunteers: Accepts Healthy Volunteers
• Gender: Female
• Age group: 20 Years to 40 Years

Eligibility

Inclusion Criteria:

• Pregnant women in Zhejiang province (and their newborns)

Exclusion Criteria:

• Endocrine disease

Study Design

Allocation: Random Sample, Primary Purpose: Screening, Time Perspective: Longitudinal

Related Conditions & MeSH terms

• Congenital Hypothyroidism
• Hypothyroidism
• Iodine Deficiency
• Pregnancy

Locations

Country	Name	City	State
China	Children's Hospital Zhejiang University School of Medicine	Hangzhou	Zhejiang

Sponsors (1)

Lead Sponsor	Collaborator
Zhejiang University

Country where clinical trial is conducted

China,