Disease relevance of Maternal Age

• Furthermore, the increase in miscarriages could not be explained by differences in thyroid hormone levels, the presence of cardiolipin autoantibodies, maternal age, gestational age at the time of maternal entry into the study, or previous obstetric history [1].
• Collaborative study of Down syndrome screening using maternal serum alpha-fetoprotein and maternal age [2].
• However, there might be a positive association with development of asthma--in particular, for cesarean section--that was not explained by gestational age, birth weight, ponderal index, smallness for gestational age, parity, maternal age, or occupation [3].
• Independent variables included groups 1 and 2, maternal age, parity, prepregnancy BMI, gestational age, weight gain during pregnancy, fetal sex, and the following averaged 24-h profile maternal capillary blood glucose values: preprandial, 1-h postprandial, and 2-h postprandial [4].
• Asthma, allergic rhinitis and eczema at conscription were analysed in relation to area of residence, parental occupation, maternal age, family size and being the first born for 1 309 652 male conscripts in three successive cohorts born between 1952 and 1981 [5].

Psychiatry related information on Maternal Age

• In the remaining maternal age conditions, ethanol delayed offspring olfactory orientation and increased locomotor activity, the latter dissipating after 50-60 days of age [6].

High impact information on Maternal Age

• Their results implicate an age-dependent loss of function in SMC1beta (or related proteins) in the maternal age effect of humans [7].
• METHODS: 255 children from cryopreserved embryos were matched by maternal age, parity, single or twin pregnancy, and date of delivery with 255 children born after IVF with fresh embryos, and 252 children from spontaneous pregnancies [8].
• UK multicentre project on assessment of risk of trisomy 21 by maternal age and fetal nuchal-translucency thickness at 10-14 weeks of gestation. Fetal Medicine Foundation First Trimester Screening Group [9].
• Maternal age, somatic mosaicism, and Alzheimer disease [10].
• Although women with SLE, RA, and pregestational DM were significantly older than women in the general obstetric population, disparities in the risk of adverse outcomes of pregnancy remained statistically significant after adjustment for maternal age [11].

Chemical compound and disease context of Maternal Age

• Gestational hypertension and advanced maternal age were significantly decreased with DCH, and cocaine abuse was uncommon (3 cases) [12].
• Low unconjugated oestriol levels can be used to detect fetal Down's syndrome; at cut-off levels selected to detect at least 35% of affected pregnancies, unconjugated serum oestriol was a better screening test than either maternal age or serum alpha-fetoprotein (AFP) [13].
• The addition of two new markers in maternal serum, estriol and HCG, to those already known, namely the level of maternal serum alfa-fetoprotein and maternal age, considerably improves the expected results of a screening strategy for Down syndrome [14].
• RESULTS: Cases in the oligohydramnios (n = 51) and adequate fluid (n = 49) groups were the same for maternal age, race, parity, gestational age, and predose Bishop score [15].
• The groups were also similar in maternal age, race, payor status, type of steroid given, route of delivery, gender, and birth weight [16].

Biological context of Maternal Age

• Variables used for analysis were eight antiepileptic drugs (AEDs) and total daily dosages (drug score), and seven background factors consisting of maternal age at delivery, gravida, outcome of previous pregnancy, etiology and type of epilepsy, occurrence of seizures in the first trimester of pregnancy, and seizure frequency during pregnancy [17].
• The genetic risk of fetal autosomal trisomies for women less than age 35 offered amniocentesis with maternal serum alpha-fetoprotein values less than 0.5 multiples of the median is in the same range as that currently accepted for advanced maternal age [18].
• The screening test was considered positive if either maternal serum concentrations of alpha-fetoprotein (MSAFP), hCG, and unconjugated estriol (E3) fell below defined levels, or the second-trimester patient-specific risk (based on maternal age and serum analytes) was greater than 1:100 [19].
• Taken together with the suggestion of a maternal age effect in our series these data suggest that follicular stimulation regimes which precede IVF do not necessarily add to the naturally high aneuploidy rate of the human species [20].
• Logistic regression analysis showed that maternal age, race, gravidity, White class, duration of diabetes, maternal vasculopathy, and cigarette smoking were not significant variables correlated with minor congenital malformations [21].

Anatomical context of Maternal Age

• Cycles with good sperm morphology and motility, the presence of mature oocytes, the retrieval of a large number of oocytes and younger maternal age seem to provide the best chance for IVF success [22].
• Amniotic fluid alpha-fetoprotein (AFP) concentrations were measured in 2180 patients at risk of fetal abnormality because of previous history, family history, advanced maternal age, suspected fetal growth retardation and hydramnios [23].
• These included maternal age, ethnic origin, parity, ABO and Rhesus D blood group, antenatal haemoglobin, alcohol and cigarette consumption at time of registration, mode of delivery, duration of the first and second stages of labour, gestational age, birth weight, cord pH and cord erythrocyte mean cell volume (MCV) [24].
• This study was undertaken to assess the usefulness of maternal serum human chorionic gonadotrophin, alpha-fetoprotein and maternal age in screening for fetuses with abnormal chromosomes in pregnant women aged 35 years and over [25].
• Biotin concentrations in egg yolk and chick plasma were related to maternal intake and increased with maternal age [26].

Associations of Maternal Age with chemical compounds

• There was a progressive increase in screening serum glucose levels and a significantly higher incidence of diabetes with increasing maternal age [27].
• Although the mean estradiol level per preovulatory follicle showed a slight decrease with maternal age, no statistically significant trend was noted [28].
• The 2-h, 75-g glucose load values were significantly associated in both periods with neonatal CC/TC ratio </=10th percentile and ponderal index >/=90th percentile, whereas maternal age >35 years was an independent predictor of both neonatal CC/TC ratio </=10th percentile and macrosomia [29].
• Using a multivariate risk analysis of maternal age and concentrations of alpha-fetoprotein, unconjugated estriol, and hCG in maternal serum, I determined that, at a risk cutoff value of 1 in 300, 52% of Down's cases could be detected with total hCG in the calculation, compared with 66% with the free beta-hCG concentration [30].
• These results are adjusted for region, interview year, periconceptional folic acid supplementation, maternal age, weight, education, and infections early in pregnancy [31].

Gene context of Maternal Age

• To evaluate the role of the FMR1 repeat in POF, repeat sizes were examined in 53 women with idiopathic POF, 161 control women from the general population, and 21 women with proven fertility at an advanced maternal age [32].
• Risk of type 1 diabetes in childhood and maternal age at delivery, interaction with ACP1 and sex [33].
• One of the most significant findings in this study is that maternal age influences the survival of Axd embryos in utero [34].
• Erythropoietin levels were influenced by parity but not maternal age [35].
• Advanced maternal age resulted in a high exencephaly rate in Sp/Sp female embryos (but not other genotypes) and a high overall resorption rate [36].

Analytical, diagnostic and therapeutic context of Maternal Age

• Given the markedly lower frequency of autoantibodies in offspring of mothers, larger sample sizes will be required to determine whether islet autoantibodies are influenced by age of IDDM onset of mothers, maternal age of pregnancy, and presence of diabetes in these mothers prior to conception [37].
• RESULTS: Univariate analysis revealed that there were no significant differences between the study and control groups with respect to maternal age, parity, or betamethasone exposure [38].
• RESULTS: The mean (+/- standard deviation) maternal age (31.6 +/- 5.9 versus 30.5 +/- 6.3 years), body mass index (28.8 +/- 5.1 versus 28.8 +/- 4.5 kg/m2), and parity (3.0 +/- 1.6 versus 2.8 + 1.7) were not different between the lactating and nonlactating groups, respectively [39].
• Total estrogens (TE), estradiol (E2), estriol (E3), and human placental lactogen (hPL) were determined by radioimmunoassay in the blood of 126 pregnant women during their 26th and 31st weeks of pregnancy and the results were studied in relation to maternal age and parity [40].
• BACKGROUND: The percentage of children born after IVF will continue to increase due to demographic changes such as increasing maternal age and new developments in assisted reproduction techniques [41].

References