Ignite Creation Date:
2025-12-24 @ 4:00 PM
Ignite Modification Date:
2025-12-31 @ 8:43 AM
Study NCT ID:
NCT00327366
Status:
COMPLETED
Last Update Posted:
2009-10-19
First Post:
2006-05-17
Is NOT Gene Therapy:
True
Has Adverse Events:
False
Brief Title:
Effect of Bright Light on Sex Hormones and Ovulation in Humans
Sponsor:
Russian Academy of Medical Sciences
Organization:
Study Overview
Official Title:
None
Status:
COMPLETED
Status Verified Date:
2009-10
Last Known Status:
None
Delayed Posting:
No
If Stopped, Why?:
Not Stopped
Has Expanded Access:
False
If Expanded Access, NCT#:
N/A
Has Expanded Access, NCT# Status:
N/A
Acronym:
None
Brief Summary:
The study investigated whether bright artificial light may influence menstrual cycle and ovulation conclusively, and what underlying hormonal changes for this effect are.
Detailed Description:
Several studies have shown a shortening of the menstrual cycle following light therapy in women with abnormally long menstrual cycles or with winter depression, which suggests that bright light may influence sex hormones and ovulation. The study was designed to investigate this possibility. Twenty-two women with slightly lengthened menstrual cycles and without clinically evident endocrine abnormalities completed a study lasting for two menstrual cycles separated by an off-protocol episode of at least 1 menstrual cycle. Bright light therapy was administered for a week at home during one experimental cycle, and dim light during another cycle (placebo-controlled, crossover, counter-balanced order). Daytime blood sampling and ultrasound scan were performed before and after a week of light therapy, on the \~7th and 14th days after menstruation onset. Ultrasound examination was repeated further to document ovulation. Serum was assayed for thyroid-stimulating hormone, prolactin, luteinizing hormone, follicle-stimulating hormone, and estradiol. The preliminary results were reported at the SLTBR meeting in June, 2005.
Study Oversight
Has Oversight DMC:
False
Is a FDA Regulated Drug?:
None
Is a FDA Regulated Device?:
None
Is an Unapproved Device?:
None
Is a PPSD?:
None
Is a US Export?:
None
Is an FDA AA801 Violation?: