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PubMed1993

[Genetic and demographic structure of the Talysh population].

Investigation was carried out in Talysh population in mountain region of South Azerbaijan. There is extended reproduction in the population. From XVIII till the beginning of XX century there were 3-3.6 offsprings in a family. In the last generation with completed reproduction, the family size raised to 7.13. Modern factors of population size dynamics are considered. It turned out that the main new factor (in conditions of increased family size) is the intensive migration from the population, mainly in men, that results in transformation of sex index in the reproductive age (ratio men/women is 0.77), and a large part of women stay unmarried. Crow index is Itot = 0.426, its components are Im = 0.115, If = 0.260.

Adolescent↗
PubMed1995

Blood lead levels in relation to menopause, smoking, and pregnancy history.

Postmenopausal bone loss may result in the release of lead stored in bone. This study examined Mexican-American women aged 20 years and older who participated in the Hispanic Health and Nutrition Examination Survey (1982-1984) to assess the influence of menopause, pregnancy history, and smoking on blood lead levels. After adjustment for factors likely to influence blood lead levels and for design effects, the authors confirmed associations with age, income level, education, degree of urbanization, and body mass. Blood lead concentrations were markedly higher among current smokers and postmenopausal women, with these two factors showing separate, roughly additive effects. Gravidity had little impact on blood lead level among premenopausal women. However, among postmenopausal women, never-pregnant women had higher blood lead levels than did those who had ever been pregnant. The largest increase (4.4 micrograms/dl, 95 percent confidence interval 0.95, 7.8) was observed among smokers. In a separate analysis of postmenopausal women, women with recent menopause (4 years or less) had blood lead concentrations 1.4 micrograms/dl higher (95 percent confidence interval 0.20, 2.7) than did those whose menopause occurred more than 4 years previously. This finding, along with an overall slow decline in blood lead levels with each year after menopause, suggests that lead is being mobilized at rates consistent with the patterns of bone loss, placing women with recent menopause at increased risk for higher blood lead levels.

Adult↗
PubMed1981

Water relations of altered body functions.

Body fluids are relatively dilute aqueous solutions, so despite their complex and variable chemical constitution, the properties of water contribute materially to their physical behavior. Since there is probably no water-potential gradient anywhere in the body, those fluids are in dynamic osmotic equilibrium with each other and, because water resembles a highly mobile random network of severely distorted hydrogen bonds, a dynamic water continuum pervades the body-fluid compartments. This random network is subject to interference in a variety of ways, but its likely response is remarkably consistent with corresponding changes in major body functions. The state of body water may therefore be a more sensitive index of abnormality than hitherto supposed.

Alcoholic Intoxication↗
PubMed1997

Maternal obesity and breast-feeding success in a rural population of white women.

Maternal obesity interferes with the initiation and maintenance of lactation in animal models but it has not been investigated widely in women. We reviewed medical records from a white population to examine the relation between prepregnant overweight [body mass index (BMI; in kg/m2) 26.1-29.0] and obesity (BMI > 29.0) on initiation and duration of breast-feeding. Logistic regression revealed that of those who ever put their infants to the breast (n = 810), women who were overweight [odds ratio (OR) = 2.54, P < 0.05] or obese (OR = 3.65, P < 0.0008) had less success initiating breast-feeding than did their normal-weight counterparts (BMI < 26.1). Proportional-hazards regression revealed higher rates of discontinuation of exclusive breast-feeding in overweight (RR = 1.42, P < 0.04) and obese (RR = 1.43, P < 0.02) women and higher discontinuation of breast-feeding to any extent in overweight (RR = 1.68, P < 0.006) and obese (RR = 1.73, P = 0.001) women. Controlling for parity, socioeconomic status, maternal education, and other factors that often covary with maternal obesity and breast-feeding did not change these results. These results suggest that excessive fatness in the reproductive period may inhibit lactational performance in women.

Adult↗
PubMedDate not supplied

[The genetic and demographic structure of the population of Poltava].

It was detected that the migration coefficient of Poltava's population increased from m = 0.68 in 1960 to 0.71 in 1985. The coefficient of coincidence of married pairs in nationality and origin decreased from K = 0.152 and K = 0.055 to K = 0.119 and K = 0.043 and increased from K = 0.085 to 0.095 according to their occupation. Potential selection index comprised I = 0.1798.

Adult↗
PubMed1999

Comparative case-referent study of risk factors among hormone-related female cancers in Japan.

To assess the impact of reproductive and anthropometric factors as a risk indicator for female cancers in hormone-related organs, i.e., the breast, endometrium and ovary, we conducted a comparative case-referent study using data from the Hospital-based Epidemiologic Research Program at Aichi Cancer Center (HERPACC), Japan. The case group consisted of 1,465, 133 and 99 women who had first been diagnosed as having breast, endometrial and ovarian cancer, respectively. The referents were 25,488 female first-visit outpatients who had not previously been diagnosed with any type of cancer. The odds ratios (ORs) and their 95% confidence intervals (95%CI) were estimated using an unconditional logistic regression model. An inverse association with experience of delivery and a positive association with body mass index (BMI) and with change of BMI after 20 years of age, were observed consistently for all three cancer sites. We observed similar risk and protective factors for breast and endometrial cancer, but the effect of reproduction and overweight condition (BMI> or =25) were more prominent in endometrial cancer. Although the present study failed to find site-specific risk factors for ovarian cancer, the results provided evidence that being overweight and/or weight gain in adult life is a common risk factor for all three cancer sites. The results obtained from this study suggested that avoidance of weight gain may reduce the risk of female hormone-related cancers.

Adult↗
PubMed1994

Color Doppler assessment of folliculogenesis in in vitro fertilization patients.

OBJECTIVES: To characterize hemodynamics of human ovarian follicles in the course of their development and to compare the results in relation to the age of patients, pregnancy, location of the ovary, and the quality of the oocytes. DESIGN: Serial measurements of peak velocity and resistance index by color Doppler imaging. SETTING: The In Vitro Fertilization Clinic, Success Through Assisted Reproductive Technologies, Inc., Toronto, Ontario, Canada. PATIENTS: Fifty-two women undergoing hormonal stimulation for IVF. MAIN OUTCOME MEASURES: The perifollicular peak velocity and resistance index values. RESULTS: The perifollicular peak velocity values were gradually increasing with the increasing size of the follicles. Highly significant elevation of the peak velocity was observed especially after hCG injection. Such rapid rise of blood velocity was greater in the right ovary than in the left in the younger patients (mean age, 34 years) whereas in older patients (mean age, 41 years), the greater values were observed in the left ovary. There was no significant difference in peak velocity or resistance index between pregnant and nonpregnant patients. CONCLUSIONS: There is a strong, positive correlation between the size of ovarian follicles and their peak velocity, which suggests an increase of blood flow around developing follicles in the course of the follicular phase. Human chorionic gonadotropin plays an important role in inducing influx of blood within follicles; however, the significance of this event remains obscure. It appears that the resistance index is not a useful parameter for characterization of the intrafollicular flow. Changes in peak velocity did not correlate with oocyte quality and may have no predictive value for IVF outcome.

Adult↗
PubMed2006

Use of a GnRH agonist and hCG to obtain an index of testosterone secretory capacity in the koala (Phascolarctos cinereus).

Testosterone secretion in mammals typically occurs in random pulses such that a single blood sample provides limited information on reproductive endocrine status. However, it has been shown in several species that an index of the prevailing testosterone biosynthetic capacity of the testes can be obtained by measuring the increase in circulating testosterone after injection of a GnRH agonist or human chorionic gonadotrophin (hCG). Hence, the aims of the present study were to examine fluctuations in testosterone secretion in the koala (n = 6) over a 24-hour period and then characterise testosterone secretion after injection of the GnRH agonist buserelin (4 micro g) or hCG (1000 IU). The latter was used to establish an index of the prevailing testosterone biosynthetic capacity of the koala testis. Individual koalas showed major changes in blood testosterone concentrations over 24 hours, but there was no apparent diurnal pattern of testosterone secretion (P > .05). Injection of buserelin and hCG resulted in an increase (P < .05) in blood testosterone concentration. After injection of exogenous hormone, near maximal concentrations of testosterone occurred at around 60 minutes. There was a tendency for plasma testosterone to decline after 90 minutes with buserelin, but concentrations remained close to the upper limit for 240 minutes with hCG. There were strong positive correlations between the average testosterone concentration over 24 hours and the maximum observed testosterone concentration after stimulation with GnRH and hCG (GnRH, r = .772; P = .07 and hCG, r = 1.0; P < .01). The findings in the present study confirmed that individual male koalas can show large fluctuations in blood testosterone concentrations over time and that a GnRH agonist and hCG can be used in the koala to obtain an index of the prevailing steroidogenic capacity of the testes.

Animals↗
PubMed2003

Quantitation by image analysis of global DNA methylation in human spermatozoa and its prognostic value in in vitro fertilization: a preliminary study.

OBJECTIVE: To determine the relationship between sperm DNA methylation level and sperm characteristics and pregnancy rates. DESIGN: Prospective study. Quantitation by image analysis of DNA methylation in sperm nucleus. SETTING: Department of Reproduction Biology, Edouard Herriot Hospital, Lyon, France. PATIENT(S): Infertile couples undergoing IVF-ET. INTERVENTION(S): The immunostaining of 5 methyl-cytosine was performed on the spare sperm suspension that was used for an assisted reproduction technology procedure. MAIN OUTCOME MEASURE(S): Sperm characteristics according to World Health Organization criteria, sperm motility parameters with computer-assisted semen analysis, sperm DNA methylation level, and heterogeneity index (HI). RESULT(S): Sperm DNA methylation level and HI are correlated with sperm DNA characteristics. HI is negatively correlated with fertilization rate; sperm DNA methylation level is correlated with pregnancy rate. CONCLUSION(S): The DNA methylation level in human spermatozoa could be a new approach to evaluating the ability of spermatozoa to fertilize and lead to normal embryo development.

3,3'-Diaminobenzidine↗
PubMed2001

Risk factors for epithelial borderline ovarian tumors: results of a Swedish case-control study.

OBJECTIVE: Borderline ovarian tumors have a favorable prognosis. Previous epidemiological studies indicate common risk factors for invasive epithelial ovarian cancers and borderline tumors, but it remains unresolved whether these tumors are precursors of invasive cancers or a separate disease entity. The objective of this population-based case-control study conducted in 1993-1995 was to examine reproductive and other factors in relation to the risk of borderline ovarian tumors. METHODS: Subjects were 193 histologically verified incident epithelial borderline tumor cases and 3899 randomly selected controls aged 50-74 years, whose data were collected through mailed questionnaires. Risk estimates were calculated by unconditional logistic regression. RESULTS: Ever parous women were at reduced risk, with odds ratios of 0.44 (95% confidence interval (CI) 0.26-0.75) for serous and 0.63 (95% CI 0.34-1.19) for mucinous tumors. No clear trends emerged for age at first birth, at menarche, and at menopause. Lactation reduced tumor risk. Oral contraceptive ever use conferred no protection, with odds ratios of 1.40 (95% CI 0.87-2.26) for serous and 1.04 (95% CI 0.61-1.79) for mucinous tumors. The odds ratio for serous tumors following unopposed estrogen ever use was 2.07 (95% CI 1.08-3.95), whereas no risk increase appeared with estrogens supplemented by cyclic or continuous progestins. Mucinous tumors were not associated with hormone replacement therapy. The odds ratio for serous tumors in the highest category of body mass index was 6.47 (95% CI 3.09-13.5). CONCLUSIONS: Increasing parity and lactation reduce the risk of borderline ovarian tumors in women aged 50-74, while no protection follows oral contraceptive use. Hormonal situations such as unopposed estrogen use and obesity, where estrogens are not counteracted by progestins, may increase the risk of serous tumors.

Aged↗
PubMed2003

Isolated esophageal atresia and perinatal risk factors.

Esophageal atresia (EA) is a relatively rare alimentary tract congenital anomaly. We studied perinatal risk factors of 90 live birth cases of isolated EA with (40 cases) or without (50 cases) tracheal fistula. We found sex ratios of 1.43 for total EA cases and 1.5 for both subgroups of EA with or without tracheal fistula. Evaluation of parity showed statistically significant values for low parity and for high multiparity for EA with and without tracheal fistula. Birth weight evaluation revealed statistically significant values for both subgroups. We did not find statistical significance both for maternal age and gestational age. The etiology of esophageal atresia is complex and heterogeneous and within each subgroup, apparently different etiologies may exist, resulting in differences in epidemiologic characteristics. Moreover, some causes linked to genetics and gene-environment interaction may be involved. We think that parity and low birth weight can be considered as risk factors for EA, and an accurate evaluation of reproductive history can be useful for the provision of genetic and perinatal counseling.

Case-Control Studies↗
PubMed2005

A review of pregnancy outcomes after exposure to orally inhaled or intranasal budesonide.

BACKGROUND: Inadequately controlled rhinitis is associated with worsening asthma, one of the most common potentially serious causes of pregnancy complications. Recent evidence-based guidelines now stress the importance of inhaled corticosteroids as first-line therapy in controlling asthma during pregnancy, with preference given to budesonide. Both inhaled and intranasal budesonide formulations are rated Pregnancy Category B; all other inhaled and intranasal corticosteroids are rated Pregnancy Category C. OBJECTIVE: To review data from clinical and epidemiological studies investigating the effects of orally inhaled or intranasal budesonide on pregnancy outcomes. METHODS: Clinical and epidemiological studies on the effects of maternal exposure to orally inhaled or intranasal budesonide were identified through searches of the literature indexed on Medline or the Developmental and Reproductive Toxicology (DART) database through January 2005. The search terms used were: 'budesonide' and 'pregnancy'; 'pregnancy complications'; 'teratogens'; 'fetus'; 'embryo'; or 'toxicology'. The search was limited to English-language articles and those evaluating humans. Pertinent abstracts were identified from recent US asthma and allergy meetings. RESULTS: A total of five articles and three abstracts meeting the search criteria were identified. Retrospective epidemiological studies and a randomized, placebo-controlled, multicenter trial found no clinically or statistically significant effects on fetal outcomes among more than 6600 infants whose mothers were exposed to orally inhaled budesonide during pregnancy. Women who reported use of orally inhaled budesonide either during early pregnancy only or throughout pregnancy gave birth to infants of normal gestational age, birth weight, and length, with no increased rate of stillbirths, multiple births, or congenital malformations. In a retrospective case-control analysis, no association was found between inhaled budesonide or intranasal budesonide and the overall rate of infant cardiovascular defects. However, a marginally increased risk of less severe cardiovascular defects (odds ratio = 1.58, 95% confidence interval 1.02 to 2.46) was observed with intranasal budesonide in one analysis, possibly the result of a random association due to multiple testing or an unidentified confounder. CONCLUSION: Maternal exposure to orally inhaled budesonide during pregnancy is not associated with an increased risk of congenital malformations or other adverse fetal outcomes in studies of more than 6600 infants. Data on pregnancy outcomes after maternal exposure to intranasal budesonide are limited, but the totality of evidence, including pharmacological studies showing a much lower systemic exposure after intranasal administration, indicates its safety profile is at least comparable with that of orally inhaled budesonide.

Abnormalities, Drug-Induced↗
PubMed2002

Relationship of serum leptin concentration with bone mineral density in the United States population.

Overweight is associated with both higher bone mineral density (BMD) and higher serum leptin concentrations. In humans, little is known about the relationship of leptin concentration and bone density. We studied this relationship in a large, national population-based sample. Participants included 5815 adults in the Third U.S. National Health and Nutrition Examination Survey (NHANES III; 1988-1994) who underwent DXA of the proximal femur and measurement of fasting serum leptin. Mean +/- SE BMD (gm/cm2) of the total hip was 1.01 +/- 0.005 in men, 0.94 +/- 0.004 in premenopausal women, and 0.78 +/- 0.007 in postmenopausal women. Bone density increased with increasing leptin concentration in men (p = 0.003), premenopausal women (p < 0.001), and postmenopausal women (p < 0.001). However, after adjusting for body mass index (BMI) and other bone density-related factors, an inverse association emerged in men (p < 0.001), being most evident among men < 60 years old. There was no association of leptin and BMD in premenopausal women (p = 0.66) or postmenopausal women (p = 0.69) in multivariate analysis. Controlling for leptin had no effect on the strong positive association of BMI and BMD in either men or women. Serum leptin concentration did not appear to affect directly BMD. If present, the association appeared to be limited to younger men who are at lower risk of osteoporosis.

Absorptiometry, Photon↗
PubMed1994

Sugar, meat, and fat intake, and non-dietary risk factors for colon cancer incidence in Iowa women (United States).

To investigate the relation of dietary intakes of sucrose, meat, and fat, and anthropometric, lifestyle, hormonal, and reproductive factors to colon cancer incidence, data were analyzed from a prospective cohort study of 35,215 Iowa (United States) women, aged 55-69 years and without a history of cancer, who completed mailed dietary and other questionnaires in 1986. Through 1990, 212 incident cases of colon cancer were documented. Proportional hazards regression was used to adjust for age and other risk factors. Risk factors found to be associated significantly with colon cancer included: (i) sucrose-containing foods and beverages other than ice cream/milk; relative risks (RR) across the quintiles = 1.00, 1.73, 1.56, 1.54, and 2.00 (95% confidence intervals [CI] for quintiles two and five exclude 1.0); (ii) sucrose; RR across the quintiles = 1.00, 1.70, 1.81, 1.82, and 1.45 (CI for quintiles two through four exclude 1.0); (iii) height; RR = 1.23 for highest to lowest quintile (P for trend = 0.02); (iv) body mass index; RR = 1.41 for highest to lowest quintile (P for trend = 0.03); and (v) number of livebirths, RR = 1.59 for having had one to two livebirths and 1.80 for having had three or more livebirths compared with having had none (P for trend = 0.04). These data support hypotheses that sucrose intake or being tall or obese increases colon cancer risk; run contrary to the hypothesis that increased parity decreases risk; support previous findings of no association with demographic factors other than age, cigarette smoking, or use of oral contraceptives or estrogen replacement therapy; and raise questions regarding previous associations with meat, fat, protein, and physical activity.

Age Factors↗
PubMedDate not supplied

Serum leptin levels during childhood and adolescence: relationship with age, sex, adiposity and puberty.

We studied serum leptin levels in 189 healthy children to evaluate related factors during childhood and adolescence. Leptin correlated with body mass index (BMI), triceps skinfold thickness (p<0.001) and body weight (p<0.01). Obese children and girls had higher leptin levels than non-obese children and boys, respectively (p<0.001). In girls, leptin correlated positively with age, skinfold thickness and BMI (p<0.001). In boys, leptin correlated negatively with age (p<0.001) and positively with skinfold thickness (p<0.05). Prepubertal boys had higher leptin levels than prepubertal girls and pubertal boys (p<0.05). Pubertal girls had higher leptin levels than prepubertal girls and pubertal boys (p<0.001). Leptin levels in girls were higher at Tanner stages 4 and 5 than at stage 1 (p<0.001). In conclusion, serum leptin levels are related with adiposity, have obviously age-related gender differences during childhood and adolescence, and may be involved in the maturation of reproductive capacity.

Adolescent↗
PubMed1992

[Cell-mediated immune reactivity to sperm in disorders of human reproduction].

Besides the pathological anti-sperm humoral immunity, pathological anti-sperm cell-mediated immunity is considered as a crucial facet of the disturbances of human reproduction (male and female infertility, recurrent abortions, endometriosis, late EPH gestosis, fetal hypotrophy). A precise and objective method is designed, based on a one-step agarose Leukocyte Migration Inhibition Factor assay. The migration areas are evaluated by a computer-assisted image analysis system. Optimal concentrations of leukocytes and sperm, as well as technical conditions are described. The Radius Migration Indexes and Area Migration Indexes are computed and expressed as a Migration Index percentage for each patient or control. Preliminary clinical results indicate a highly significant association between leukocyte migration inhibition and cases of "immunopathological" infertility and repeated fetal loss.

Cell Migration Inhibition↗