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Experts blast Trump for foreign policy blunders. Answer Save. And it's very natural. Obi Wan Knievel Lv 7. Not at the moment, no.

The whole place is under a lockdown. They depend on what hormones the body makes, how much it makes, and whether the body responds to the hormones.

Before birth, testosterone makes the body develop as a boy. The body develops a penis and a scrotum. They develop a clitoris, labia and a vagina.

At puberty, people make larger amounts of testosterone and estrogen. These cause more changes in their bodies. Testosterone makes both men and women grow hair in their armpits and groins.

Hair in the groin is called pubic hair. Testosterone also makes men have stronger muscles, deeper voice, and facial hair.

Estrogen makes women have breasts and wider hips. Some people believe that there are more than two genders. Some people also experience their gender as fluid.

When babies are born, they are usually assigned a sex based on how their genitals look. For many people, their gender identity is the same as the sex assigned at birth.

However, for some people, their gender identity does not match their assigned sex. Some experts think that female sperm are more likely to reach the egg in the middle of your fertile period.

So if you're having frequent sex, you have higher odds of having sex during both the start and end of your fertile window, when male sperm have a slight advantage.

Of the women who had the highest daily intake about 2, calories , 56 percent had boys. Of the women who had the lowest intake about 2, calories , only 45 percent had boys.

Another study looked at 68 million births and found that women who gained more weight during pregnancy were more likely to be having boys.

Female sperm are more robust and baby girls are hardier early in pregnancy, so in leaner times they may be more able to survive.

This may be because more viral and bacterial infections are around in the winter. As male sperm and embryos are more fragile, they may be less able to withstand the mother's catching an infection than female embryos.

Women carrying boys have a higher risk of developing gestational diabetes. Exactly why isn't clear, but it's possible that male fetuses interfere with cell functioning that affects glucose metabolism.

The older the dad and mom, the more likely female sperm are to fertilize the egg. This could be due to hormonal changes in the woman as she ages. And older men produce fewer male sperm.

Or it could be that older couples are more likely to have sex in the middle of the fertile period, when female sperm may have the edge over male sperm.

You're slightly more likely to have a baby girl if you have severe morning sickness hyperemesis gravidarum. A review of 13 studies found that 55 per cent of babies born to women who'd had severe morning sickness were girls.

This was compared to 49 percent in the control group who didn't suffer from it. A study of Japanese births from to found that more girls were conceived during a particularly hot summer in , and again during an extremely cold winter in Other research has shown that warm temperatures appear linked to girl babies.

And a global survey of birth data showed that more girls are born in the tropics the region around the equator than anywhere else in the world.

One theory is that weather extremes cause stress. In addition to the uncomfortable temperatures, very hot or cold places tend to have poor nutrition, high levels of pollutants, and insufficient or excessive sunlight.

Such stress is especially hard on male fetuses, which are more fragile than female fetuses in the earliest months of pregnancy. Women working in mentally stressful jobs outside the home may be more likely to have a girl.

A study looking at more than 16, births in a British hospital found that among women with jobs considered highly stressful, 53 percent had a daughter.

In comparison, 46 percent of women with jobs considered less stressful had a daughter. A few studies have looked at the dad's occupation and the baby's gender.

They found that dads with jobs that involve stress or pollutants seem to end up with more girls. Though they were small-scale studies that looked only at certain occupations, dads with the following jobs had more girls than average:.

However, other experts aren't convinced. It's possible that the more children you have, the more likely you are to have a girl. This may be due to the fact that the more pregnancies you have, the higher your levels of the hormone gonadotrophin.

Some experts have claimed that these higher hormonal levels could be linked to an increased chance of having a girl. Moms who give birth to girls tend to have slightly longer pregnancies.

Boys are more likely to be born before their due date. After the week mark, however, the odds slightly favor a girl. Get an inside look at how girls and boys develop.

Can parents choose to have a boy or a girl?

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Most girls have two X chromosomes. However, some boys and girls may have different chromosome patterns. For example, some girls have one X and one Y chromosome.

They tell the body how to grow and develop. Sex hormones are made by glands inside the body called gonads. There are two types of gonads: testes and ovaries.

Most boys have testes and most girls have ovaries. Testes make hormones called androgens. Testosterone is one type of androgen. Ovaries make estrogen, and some testosterone.

In addition, testes make sperm and ovaries make eggs. In terms of body parts, people have reproductive parts inside and outside their bodies.

Gonads are one of the parts inside the body. Also inside the body, most girls have a vagina, a cervix and a uterus. The parts outside the body are called genitals.

Most boys have a penis and a scrotum. Most girls have a clitoris, labia and a hole for the vagina. Some children have a mix of male and female reproductive parts, like testes and a vagina, or genitals that are not clearly male or female.

This is called a difference or disorder of sex development. Some people may use different words, such as intersex. Before birth and at puberty, hormones make the body parts grow and change.

The growth and change depend on several things. Women carrying boys have a higher risk of developing gestational diabetes. Exactly why isn't clear, but it's possible that male fetuses interfere with cell functioning that affects glucose metabolism.

The older the dad and mom, the more likely female sperm are to fertilize the egg. This could be due to hormonal changes in the woman as she ages.

And older men produce fewer male sperm. Or it could be that older couples are more likely to have sex in the middle of the fertile period, when female sperm may have the edge over male sperm.

You're slightly more likely to have a baby girl if you have severe morning sickness hyperemesis gravidarum. A review of 13 studies found that 55 per cent of babies born to women who'd had severe morning sickness were girls.

This was compared to 49 percent in the control group who didn't suffer from it. A study of Japanese births from to found that more girls were conceived during a particularly hot summer in , and again during an extremely cold winter in Other research has shown that warm temperatures appear linked to girl babies.

And a global survey of birth data showed that more girls are born in the tropics the region around the equator than anywhere else in the world.

One theory is that weather extremes cause stress. In addition to the uncomfortable temperatures, very hot or cold places tend to have poor nutrition, high levels of pollutants, and insufficient or excessive sunlight.

Such stress is especially hard on male fetuses, which are more fragile than female fetuses in the earliest months of pregnancy.

Women working in mentally stressful jobs outside the home may be more likely to have a girl. A study looking at more than 16, births in a British hospital found that among women with jobs considered highly stressful, 53 percent had a daughter.

In comparison, 46 percent of women with jobs considered less stressful had a daughter. A few studies have looked at the dad's occupation and the baby's gender.

They found that dads with jobs that involve stress or pollutants seem to end up with more girls. Though they were small-scale studies that looked only at certain occupations, dads with the following jobs had more girls than average:.

However, other experts aren't convinced. It's possible that the more children you have, the more likely you are to have a girl.

This may be due to the fact that the more pregnancies you have, the higher your levels of the hormone gonadotrophin. Some experts have claimed that these higher hormonal levels could be linked to an increased chance of having a girl.

Moms who give birth to girls tend to have slightly longer pregnancies. Boys are more likely to be born before their due date.

After the week mark, however, the odds slightly favor a girl. Get an inside look at how girls and boys develop. Can parents choose to have a boy or a girl?

Find out what folk wisdom claims — and what scientists say. Take our poll and find out who wants to know their baby's sex before the birth. Cagnacci A, et al.

The male disadvantage and the seasonal rhythm of sex ratio at the time of conception. Human Reproduction 18 4 Grant VJ, et al.

A simple model for adaptive variation in the sex ratios of mammalian offspring. Journal of Theoretical Biology 1 Hohmann S, et al.

The changing sex ratios at birth during the civil war in Tajikistan: Journal of Biosocial Science 42 6 James WH. Evidence that mammalian sex ratios at birth are partially controlled by parental hormone levels around the time of conception.

Journal of Endocrinology Jongbloet PH. Over-ripeness ovopathy: a challenging hypothesis for sex ratio modulation. Hum Reprod 19 4 Mathews F, et al.

You are what your mother eats: Evidence for maternal preconception diet influencing foetal sex in humans. Matsuo K, et al.

Parental aging synergistically decreases offspring sex ratio. Journal of Obstetrics and Gynaecology Research 35 1 Melnikov VN, et al. Seasonality of live birth sex ratio in south western Siberia, Russia, Journal of Epidemiology and Community Health 57 6 Veenendaal MV, et al.

Consequences of hyperemesis gravidarum for offspring: a systematic review and meta-analysis. BJOG 11

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