Sentences with phrase «menarche in»

The mean age at menarche in this sample was13 years (range, 8.5 - 15 years), and 46 % of the adolescent boys had their growth spurt from ages 13 to 15 years.

Early maturing girls may begin breast development as early as third grade and may reach menarche in fourth or fifth grade.

BPA alters the action of Luteinizing Hormone and Follicle Stimulating Hormone which control menarche in girls.

When looking for correlations between the micronutrient levels and physical fitness, they took into account the adolescents» age, time of year, latitude of the city they lived in, body mass index, age of menarche in females, and amount of regular physical activity (using accelerometers).

«Ultimately this reinforces the importance of including age of menarche in many more studies.»

Not exact matches

It may lead to the early onset of menarche and early development of breast tissue in developing girls.

Beginning with an imaginary journey into the red tent, a traditional place of women's wisdom, some of the gifts and secrets of womanhood are imparted in a gentle lyrical way along with practical advice on preparing for her first period, choosing menstrual products, herbal healing, and celebrating menarche.

Girls go through menarche between the ages of 9 and 16, and the variations in LIN28B accounted for just one to three months of these differences.

«It's sort of the tip of the iceberg,» says Uitterlinden, who led one of four groups that identified several variations in a gene called LIN28B that affect the timing of girls» first period, or menarche.

His team, as well as independent groups based in the UK, the US and Iceland, uncovered this gene's role by comparing genome - wide scans of thousands of women with their age at menarche.

All four teams focused their hunts on gene variations found in at least 10 per cent of the population, while Stefánsson thinks that rarer variants may play a more significant role in menarche.

Just how LIN28B might affect menarche isn't clear, says Ken Ong, a paediatrician at the Medical Research Council Epidemiology Unit in Cambridge, UK, who led another team.

That's according to Misao Fukuda at the M&K Health Institute in Hyogo, Japan, and colleagues, who found subtle differences in sex ratios of children depending on when a mother entered menarche.

In rural Malawi, 55 percent of those who had their first period before age 14 had sex before the age of 16, compared with 27 percent of those with menarche at age 14 to 15, and only 4 percent of those with menarche at age 16 or older.

The Columbia researchers used data from peer - reviewed studies and health and social sciences databases to assess the link between menarche and various negative sexual and reproductive health outcomes in adolescence.

«Despite possible similarities in the relationship between early menarche and sexual and reproductive health in low -, middle - and high - income countries, the factors associated with early menarche and early marriage may differ across ethnic groups within the same country,» noted Mobolaji Ibitoye, MPH, DrPH candidate in the Department of Sociomedical Sciences at the Mailman School and lead author.

«This highlights the need for a greater understanding of the cultural and regional variations in the effect of age at menarche on age at marriage both within and between countries.»

Reykjavik, ICELAND, May 17, 2009 — In a paper published today in the online edition of Nature Genetics, scientists from deCODE genetics (Nasdaq: DCGN) and academic colleagues from Iceland, Denmark and the Netherlands present the discovery of single letter variations in the sequence of the human genome (SNPs) that influence the age of girls at menarche, the first menstrual perioIn a paper published today in the online edition of Nature Genetics, scientists from deCODE genetics (Nasdaq: DCGN) and academic colleagues from Iceland, Denmark and the Netherlands present the discovery of single letter variations in the sequence of the human genome (SNPs) that influence the age of girls at menarche, the first menstrual perioin the online edition of Nature Genetics, scientists from deCODE genetics (Nasdaq: DCGN) and academic colleagues from Iceland, Denmark and the Netherlands present the discovery of single letter variations in the sequence of the human genome (SNPs) that influence the age of girls at menarche, the first menstrual perioin the sequence of the human genome (SNPs) that influence the age of girls at menarche, the first menstrual period.

The paper, «Genome - wide association study identifies sequence variants on 6q21 associated with age at menarche,» is published in the online edition of Nature Genetics, at www.nature.com/ng, and will be published in an upcoming print edition of the journal.

Additionally, «Having an earlier age at menarche has been associated with elevated blood pressure and glucose intolerance, increased body fat in early adulthood, or obesity in adulthood, all of which could explain the possible link between the age at menarche and risk of mortality outcomes later in life.»

Our menarche, our first bleed, is when our song, our life purpose, our truth is awakened in us.

Studies to date do not find any association between milk intake and age of menarche (first menses) in girls.

In this post, you'll learn all the open conversations about menarche (the first period) that I've had with my daughter, plus practical, fun, and special ideas to celebrate this rite of passage in every girls» lifIn this post, you'll learn all the open conversations about menarche (the first period) that I've had with my daughter, plus practical, fun, and special ideas to celebrate this rite of passage in every girls» lifin every girls» life!

(* My own estimate: average number of years from menarche to wanting to start a family based on the women I see in my clinic.)

Originated 1970s by Dr. Henry Lemon, who tested estrogen levels in 24 hour urine samples and found that an EQ > 1 strongly correlated with a higher survival rate after breast cancer.24 Further research conducted by Lemon, Heidel, et al., a meta - analysis of published fractional estrogen excretion collected from 2,846 healthy women worldwide aged 15 to 59 years, with a risk of breast cancer varying five-fold, found that an EQ < 1 reflects increased rates of oxidation of estrone or estradiol to 4 - OH catechols (also referred to in the literature as the 3,4 - catechol estrogen quinones), which have been identified as the principal proximal human mammary carcinogens after menarche, while an EQ > 1 reflects conversion to protective 2 - OH estrogen metabolites.2526

I thought my period reappeared because my 13 year old daughter just had menarche and you know how two women living in the same house can affect each other... until I realized that since the warmer months are here I stopped taking my vitamin D.

The importance of active ductal growth driven by estrogen has been further emphasized by the higher susceptibility of the breast to be transformed during a «high - risk» window in the lifespan of a female encompassed between menarche and a first full - term pregnancy [5].

One study showed that in the first year after menarche (start of menstruation), 80 % of girls did not ovulate, meaning they did not make progesterone.

Additionally, recent study results demonstrated that a 1 - y delay in menarche was associated with a 2.4 to 4.5 % lower total mortality.

They may suffer from abdominal distension and pain, and / or other symptoms such as: iron - deficiency anemia, chronic fatigue, chronic migraine, peripheral neuropathy (tingling, numbness or pain in hands or feet), unexplained chronic hypertransaminasemia (elevated liver enzymes), reduced bone mass and bone fractures, and vitamin deficiency (folic acid and B12), late menarche / early menopause and unexplained infertility, dental enamel defects, depression and anxiety, dermatitis herpetiformis (itchy skin rash), etc..

With menarche at 17 in Sweden only a century ago, and with the first baby having a lower chance of survival, I'd guess that the average surviving children were mostly born when the mother was between 20 and 30.

Another study linked earlier menarche to a higher risk of diabetes in adulthood — a connection that appeared to be explained by higher body mass index (BMI) among women who'd begun menstruating earlier.

Emily Stapley summarises a Mendelian randomisation study that investigates associations between the timing of menarche with depressive symptoms and depression in adolescence.

Roney, Nicole DeBias, Kristina M. Durante and Geertrui M. Spaepen, Father absence, menarche and interest in infants among adolescent girls, Developmental Science 7:5 (2004), pp 560 - 566

To examine whether girls who experience earlier menarche than their peers have higher levels of depressive symptoms in adolescence.

Age at menarche and weight concerns in relation to smoking trajectory and dependence among adolescent girls enrolled in a smoking cessation trial

A growing number of studies suggest a link between timing of menarche and risk of depressive symptoms in adolescence, but few have prospectively examined the emergence of depressive symptoms from late childhood into adolescence.

Previous research has investigated the relationship between pubertal timing and depression in girls, with most results suggesting that earlier menarche predicts more depression in adolescence.