Sentences with phrase «age at first birth»

The average age at first birth in 2006 was 25 compared to the average age at first birth age of 21 in 1970.

The cost of having children, both perceived and real, is positively associated with age at first birth and inversely related to fertility [31,118,119].

Griskevicius et al. [45] explored how high mortality risk influences preferred age at first birth using experimental methods (see § 6h, l, m, p).

The authors speculate that interest in infants may not indicate earlier intended age at first birth but rather a future quality - led parental investment strategy, as in the attachment literature (§ 6e).

This is usually measured in terms of acceptance of a first or new pregnancy, preferred family size and / or age at first birth.

Using experimental methods researchers have found support for: childhood stress (§ 6b) and father absence (§ 6c) lowering preferred age at first birth and increasing sexual risk taking [45,53]; attachment style (§ 6e) influencing parenthood - related thoughts [60]; cultural norms (§ 6m) discouraging reproduction outside stable unions [12]; women's reproductive autonomy (§ 6i) influencing their fertility preferences [47]; paternity uncertainty (§ 6j) discouraging parental investment by men [55]; high cost of children (§ 6l) encouraging delayed reproduction and lower fertility [36,47]; resource stress and limitation (§ 6o) affecting mating preferences [12,36,40,51]; and mortality risk and salience (§ 6p) encouraging a greater interest in children, earlier reproduction and higher fertility [6,41,42,45,57 — 59].

The secondary search terms were age at first birth, baby fever, childbearing, childlessness, contraceptive use, cooperative breeding, family planning, father absence, fertility, fertility desires, fertility intentions, fertility motivation, fertility preferences, ideal family size, parental investment, parenthood, parenting, reproduction, reproductive autonomy, reproductive decision - making, reproductive timing, sex ratios, sexual coercion and value of children.

Third, we examine whether parental well - being around a first birth is a stronger predictor of parity progression for highly educated parents than for those with less education, and for those with high age at first birth than for those with a lower age at first birth, net of other factors.

Indeed, «The Great Crossover,» as the report terms it, is that «for women as a whole, the median age at first birth (25.7) now falls before the median age at first marriage (26.5).»

It is possible that the factors influencing fertility of these subpopulations are particularly important for future fertility prospects because fertility is being postponed to increasingly higher ages — for example, mean age at first birth is already above 30 in Germany (OECD 2012)-- and overall educational attainment is increasing.

When modeling the relationship between these variables and educational attainment, we control for mother's age at first birth and whether the individual was the firstborn, along with gender and race or ethnicity.

Adjusted for age, education, family history of breast cancer, history of benign breast disease, parity, age at first birth, age at menarche, age at menopause, oral contraceptive use, postmenopausal hormone use, BMI, physical activity, smoking, calcium supplement use, and alcohol intake.

While age at first birth has been inching up for some time, «we have seen sharper increases since 2009,» said lead author T.J. Mathews, a demographer at the CDC's National Center for Health Statistics (NCHS).

Factors examined as potential confounders or effect modifiers included age (at breast cancer diagnosis for cases, at time of study enrollment for controls), age at first birth, number of children, birth of a son, history of breastfeeding, miscarriage, abortion, oral contraceptive use, smoking status, age at menarche and number of cell equivalents tested for detection of FMc.

For example, in two longitudinal studies of high - risk mothers («high - risk» due to low - socioeconomic status, single status, young age at first birth, and a history of abuse), the rate of intergenerational transmission ranged from 45 % (22) to 63 %.

The mean of the distribution of age at first birth in the United States is 25 years.

Not exact matches

I'm sure it was for Melania Trump, too, who said the birth of her first child, Barron, at age 35, and her husband's fifth child, was «very, very easy.»

I was not physically able to breastfeed (I tried with the first, but at 6 weeks of age he had not regained his birth weight).

Christina Marie Perez, San Antonio, TX, USA Photo: Eikonicdesign Lack of support At the age of 19, I gave birth to my first son, Adrian.

There's no magic age at which an infant snoozes for this length of time, but you can expect it to happen within the first few weeks post birth.

First, if you're not familiar with elimination communication, you should know that most babies who are EC'd from birth are actually able to stay dry all night at a much younger age than three.

I attended my first birth at the age of 7, and I have attended so many more in between, from home births to hospitals births, and almost birthing my son in the car.

Erin's HR background combined with her love of the birthing process (which started after seeing her first birth at age 12) allow her to provide support to women and families; truly getting to know them while gaining an understanding of their birthing goals.

We assumed that breastfeeding does not influence the costs of childbearing and discounted future costs by 3 % per year, the social discount rate, to the year when our hypothetical women were aged 25 years, the mean age of U.S. women at first birth.14 We performed sensitivity analyses with discount rates of 0 % and 5 %.

What is so radical about this recent transformation is that it is the age at which women give birth to their first child which is becoming comparatively high, leaving an ever more constricted window of biological opportunity for second and subsequent children, should they be desired.

The researchers concluded, «A pattern of rapid weight gain during the first 4 months of life was associated with an increased risk of overweight status at age 7 years, independent of birth weight and weight attained at age 1 year.»

aAdjusted for maternal age, method of conception, first pregnancy (previous miscarriage or ectopic pregnancy), gestational age at birth, medical indications pregnancy.

Area and individual maternal characteristics included country of residence, ward type, socioeconomic status, ethnicity (defined by Office for National Statistics guidelines and classified for this analysis as British / Irish white3 or of other ethnic origin), maternal age in years at cohort child's birth, level of education (attainment of qualification at GCSE grade G or above), parity (whether cohort child is first live birth), and lone parent status.

The first contact with the cohort was at infant age 9 months, when mothers and their partners were interviewed in their homes and information obtained on a number of factors including the circumstances of pregnancy and delivery, and infant feeding practices since birth.21 The overall response rate was 72 %.19

Jacobs 28 found that adult survivors of sexual abuse experienced longer labors, longer pregnancies, higher birth weights, more terminations, earlier age at first pregnancy, more medical problems, greater stress during pregnancy and more use of ultrasound.

For women who end up pregnant after experiencing a sexual assault, they're at a greater risk for experiencing longer labors, longer pregnancies, higher birth weights, more terminations, earlier age at first pregnancy, more medical problems, greater stress during pregnancy and more use of ultrasound.

That means that first - time mothers are older, broadly speaking, than they were as recently as 2014, when the CDC put the average age of first birth at 26.3.

She attended her first birth at the age of 3, when she helped at the birth of her brother, Isaiah - answering the phone, taking pictures, and keeping «birth notes».

We started Elimination Communication at birth, went to our first camping festival when our son was 1 month old, I flew out of state (solo) with our son at age 3 months, we did some more extensive camping and festival - going at 10 - 12 months, and at 14 months we did a 3 month traveling tour of Thailand... ECing all the while.

Our data agrees with that of others, 1223 that suggest that delaying the introduction of formula milk protects against the morbidity associated with respiratory infection, illness, and associated hospitalisations in the first year of life.24 Prolonged breast feeding was only marginally associated with less respiratory illness when examined in a New Zealand birth cohort to 2 years of age, 25 and the Dundee study8 showed a small, yet significant protective effect of breast feeding against respiratory illness at 0 — 13 weeks and 40 — 52 weeks after adjustment for social class, maternal age, and parental smoking.

In multivariate analysis, independent risk factors for delayed OL were maternal age ≥ 30 y, maternal overweight or obesity, infant birth weight < 3600 g, lack of infant «breastfeeding well» at ≥ 2 times in the first 24 h, and absence of any nipple discomfort during the first 3 d postpartum.

The study found that in the 18th and 19th centuries, about four to 18 per cent of the variation between individuals in lifespan, family size and ages at first and last birth was influenced by genes, while the rest of the variation was driven by differences in various aspects of their environment.

In this study, the proportion of women in the longest telomere tertile was higher for women in the fourth quartile of maternal age at the birth of their last child than in the first quartile (35.7 % vs 20.2 %).

Judith Klein - Seetahraman recently gave birth to her first child, at age 31.

Ruth Ley at Cornell University in Ithaca, New York, and colleagues analysed the bacteria in stool samples from a baby boy from birth to the age of 2 1/2 — the first time this has been done while the baby's diet was recorded.

Researchers examined 28,516 postmenopausal women without cardiovascular disease from the Women's Health Initiative to test associations between total number of live births, age at first pregnancy lasting at least six months, and total reproductive duration (time from first menstruation to menopause) with incident heart failure.

Overall, an earlier age at menstruation was associated with an earlier age of sexual initiation, age at pregnancy, and first live birth.

Studying older people over time can be challenging given their uncertain health, but Ritchie and his colleagues had an unusual resource in the Lothian Birth Cohort, a group of people born in 1936 whose mental function has been periodically tested by the Scottish government since 1947 — their first IQ test was at age 11.

According to the researchers, this is the first study concerning these environmental contaminants based on growth data collected during pregnancy, at birth, and up to the age of three years.

Downey used data from the National Survey of Family Growth (NSFG), administered by the National Center for Health Statistics (NCHS), to analyze the age at first marriage for women and men in the U.S., broken down by decade of birth.

In addition, one study from 2016 reported that, among 121 Latino children in California, exclusive breastfeeding in the first six weeks after birth was associated with longer telomeres at age 4 or 5.

However, she said, further studies would be required to confirm the findings and to account for behavioral differences between populations such as smoking, birth control use, and age at first sexual activity.

The first part of the study showed that giving birth multiple times was a significant contributor to obesity regardless of age, with mice who gave birth multiple times being up to 45 percent heavier than those who had a single litter at the same age that the first animals had their fourth.

The researchers compared one group of mice that gave birth four times with a second group of mice that gave birth only once, some of these at the same age that the first group had its fourth litter and some at a younger age.

From 322,972 women between the ages of 25 and 70, the team of researchers gathered data on how old the subjects were at various female biological events — first period, giving birth, breast - feeding, menopause, etc. — and other factors that would have affected these events, like taking oral contraceptives.