Biomaterial Database

Melatonin level and pattern in postpartum versus nonpregnant nulliparous women. 2006

Karen A Thomas, and Robert L Burr

Department of Family and Child Nursing in the University of Washington, Seattle, USA. kthomas@u.washington.edu

OBJECTIVE To compare 24-hour melatonin level and timing in postpartum and nonpregnant nulliparous women. Melatonin release provides information regarding circadian rhythm timing, which influences health. METHODS 2-group comparison of data derived from intensive within-subject data collection. METHODS Participants' typical daily environment. METHODS 38 postpartum and 20 nonpregnant nulliparous women. Mothers' infants were 4 to 10 weeks of postnatal age. METHODS Urinary 6-sulfatoxymelatonin assayed from each voiding and corrected for volume using creatinine. RESULTS Postpartum women had significantly higher baseline, lower maximum, lower percent rise, and differing pattern of 6-sulfatoxymelatonin than nonpregnant nulliparous women. CONCLUSIONS Differences in melatonin suggest possible circadian rhythm disruption in the postnatal period.

UI	MeSH Term	Description	Entries
D008550	Melatonin	A biogenic amine that is found in animals and plants. In mammals, melatonin is produced by the PINEAL GLAND. Its secretion increases in darkness and decreases during exposure to light. Melatonin is implicated in the regulation of SLEEP, mood, and REPRODUCTION. Melatonin is also an effective antioxidant.
D010298	Parity	The number of offspring a female has borne. It is contrasted with GRAVIDITY, which refers to the number of pregnancies, regardless of outcome.	Multiparity,Nulliparity,Primiparity,Parity Progression Ratio,Parity Progression Ratios,Ratio, Parity Progression,Ratios, Parity Progression
D011247	Pregnancy	The status during which female mammals carry their developing young (EMBRYOS or FETUSES) in utero before birth, beginning from FERTILIZATION to BIRTH.	Gestation,Pregnancies
D011569	Psychiatric Status Rating Scales	Standardized procedures utilizing rating scales or interview schedules carried out by health personnel for evaluating the degree of mental illness.	Factor Construct Rating Scales (FCRS),Katz Adjustment Scales,Lorr's Inpatient Multidimensional Psychiatric Rating Scale,Wittenborn Scales,Edinburgh Postnatal Depression Scale,Mini International Neuropsychiatric Interview
D011644	Puerperal Disorders	Disorders or diseases associated with PUERPERIUM, the six-to-eight-week period immediately after PARTURITION in humans.	Disorder, Puerperal,Disorders, Puerperal,Puerperal Disorder
D002940	Circadian Rhythm	The regular recurrence, in cycles of about 24 hours, of biological processes or activities, such as sensitivity to drugs or environmental and physiological stimuli.	Diurnal Rhythm,Nyctohemeral Rhythm,Twenty-Four Hour Rhythm,Nycthemeral Rhythm,Circadian Rhythms,Diurnal Rhythms,Nycthemeral Rhythms,Nyctohemeral Rhythms,Rhythm, Circadian,Rhythm, Diurnal,Rhythm, Nycthemeral,Rhythm, Nyctohemeral,Rhythm, Twenty-Four Hour,Rhythms, Circadian,Rhythms, Diurnal,Rhythms, Nycthemeral,Rhythms, Nyctohemeral,Rhythms, Twenty-Four Hour,Twenty Four Hour Rhythm,Twenty-Four Hour Rhythms
D003404	Creatinine		Creatinine Sulfate Salt,Krebiozen,Salt, Creatinine Sulfate,Sulfate Salt, Creatinine
D003430	Cross-Sectional Studies	Studies in which the presence or absence of disease or other health-related variables are determined in each member of the study population or in a representative sample at one particular time. This contrasts with LONGITUDINAL STUDIES which are followed over a period of time.	Disease Frequency Surveys,Prevalence Studies,Analysis, Cross-Sectional,Cross Sectional Analysis,Cross-Sectional Survey,Surveys, Disease Frequency,Analyses, Cross Sectional,Analyses, Cross-Sectional,Analysis, Cross Sectional,Cross Sectional Analyses,Cross Sectional Studies,Cross Sectional Survey,Cross-Sectional Analyses,Cross-Sectional Analysis,Cross-Sectional Study,Cross-Sectional Surveys,Disease Frequency Survey,Prevalence Study,Studies, Cross-Sectional,Studies, Prevalence,Study, Cross-Sectional,Study, Prevalence,Survey, Cross-Sectional,Survey, Disease Frequency,Surveys, Cross-Sectional
D005260	Female		Females
D006706	Homeostasis	The processes whereby the internal environment of an organism tends to remain balanced and stable.	Autoregulation

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