A study shows that women who ate at least one fatty dairy food a day were 27 % less likely to have a trouble conceiving than women who ate two or more low-fat dairy products a day. Eating ice cream and other high-fat dairy foods may lower the risk of one type of infertility, the study suggests. Eating ice cream may help women get pregnant.
This was the findings of well-known Nurses Health Study at the Harvard School of Public Health.
But some doctors say that this study sounds too good to be true and probably is. Even the researchers said that women should not conclude to this results because this study are only based to the reports of what women said they ate over many years.
The study doesn't apply to most cases of female infertility - not ovulating is to blame only one-third of the time.
The Harvard study, funded by the university and a long-running federal study, involved 18,555 women, ages 24 to 42, who became pregnant or tried to from 1991-99. Among them, 3,430 reported infertility, including 2,165 who saw a doctor for it. Of those, 438 said an ovulation problem was to blame.
If women do eat more high-fat dairy foods to try to boost their odds of conceiving, it would be important to cut calories elsewhere to avoid gaining weight, doctors said. They also should switch back to low-fat dairy foods once the baby is born, to limit saturated fats.
Wednesday, February 28, 2007
What happens after fertilization?
The fertilized egg begins to divide as it travels down the fallopian tube towards the womb. By the time it enters the womb, it has divided into a ball of about 100 cells. It settles on the wall of the womb and sinks into the surface, becoming firmly fixed. At this point, the female is pregnant.
For the first eight weeks of pregnancy, the developing egg is called an embryo. A liquid-filled bag develops around the embryo to protect it. By the fourth week of pregnancy, the embryo is the size of a grain of rice. It has a head and a tail and the beginning of limbs, and its tiny heart begins to beat. The placenta is the embryo's life-support system. It is a red, flattened organ that becomes deeply embedded in the wall of the womb. The placenta extracts food substances from the mother's blood and passes waste material from the embryo back to the mother for disposal. The placenta is connected to the developing baby by a thick umbilical cord, which contains large blood vessels.
After the first eight weeks of pregnancy, the developing baby is called a fetus. by now, all of its major organs have formed and it is growing at a very fast rate. By the 16th week, the fetus starts to move about and by the 20th week it may already have eyebrows and fingernails. It weighs approximately 350 grams.
At the 26th week, the baby is big enough to survive if it is born prematurely. It weighs about 1.5 kg and from now on it increases in weight ready to be born. Soon the bay turns over into a head-down position ready for the birth, which usually takes place at around the 38th week.
For the first eight weeks of pregnancy, the developing egg is called an embryo. A liquid-filled bag develops around the embryo to protect it. By the fourth week of pregnancy, the embryo is the size of a grain of rice. It has a head and a tail and the beginning of limbs, and its tiny heart begins to beat. The placenta is the embryo's life-support system. It is a red, flattened organ that becomes deeply embedded in the wall of the womb. The placenta extracts food substances from the mother's blood and passes waste material from the embryo back to the mother for disposal. The placenta is connected to the developing baby by a thick umbilical cord, which contains large blood vessels.
After the first eight weeks of pregnancy, the developing baby is called a fetus. by now, all of its major organs have formed and it is growing at a very fast rate. By the 16th week, the fetus starts to move about and by the 20th week it may already have eyebrows and fingernails. It weighs approximately 350 grams.
At the 26th week, the baby is big enough to survive if it is born prematurely. It weighs about 1.5 kg and from now on it increases in weight ready to be born. Soon the bay turns over into a head-down position ready for the birth, which usually takes place at around the 38th week.
Can fish make electricity?
Electric ells are well known, and they can stun their prey with a powerful shock. Other fish can also produce electricity to kill their prey or to defend themselves. They include electric rays, which are common in many warm seas and also electric catfish living in African rivers. fish called mormyrids, which live in very muddy waters in Africa, use electrical fields as a form of radar. This allows them to move about safely and to find food. They can also communicate by means of these electrical signals.
Sharks do not produce electricity, but they possess organs in their skin that can detect tiny electrical currents produced by the muscular movements of other fish. In this way they can hunt without being able to see their prey.
Sharks do not produce electricity, but they possess organs in their skin that can detect tiny electrical currents produced by the muscular movements of other fish. In this way they can hunt without being able to see their prey.
Why did the world's climate change?
The appearance of living things changed the Earth's atmosphere, providing the conditions for climate change. The first living things were plant-like creatures. They used the sun's energy to change carbon dioxide and water into sugars, which they used for food, and oxygen, which they released into the atmosphere. Some of this oxygen turned into ozone, forming the layer that now protects us from the sun's ultraviolet radiation.
In more recent times, geologists and paleontologists have been able to make more accurate measurements of the age of ancient rocks. Trees produce a new 'ring' every year, and these can be measured and counted. The width of the ring shows how well the tree grew in any year, reflecting climatic conditions at that time. The rings of even partly fossilized trees buried in bogs can be measured, and these measurements provide accurate records of climate changes over the past 750,000 years. By measuring the radioactivity of once living material, scientists can make accurate measurements up to 40,000 years ago.
In more recent times, geologists and paleontologists have been able to make more accurate measurements of the age of ancient rocks. Trees produce a new 'ring' every year, and these can be measured and counted. The width of the ring shows how well the tree grew in any year, reflecting climatic conditions at that time. The rings of even partly fossilized trees buried in bogs can be measured, and these measurements provide accurate records of climate changes over the past 750,000 years. By measuring the radioactivity of once living material, scientists can make accurate measurements up to 40,000 years ago.
Tuesday, February 27, 2007
What happens to our waste?
The huge quantities of domestic and industrial waste that we produce cause a major environmental problem. sometimes waste is buried in vast landfill sites, which are often old quarries. Alternatively, waste can be burned or in some cases recycled.
Waste from our toilets, baths and washing machines is collected in sewers and carried to a treatment plant. Bacterial action breaks down solid waste into a harmless form, and the waste is stirred in huge pools while this process takes place. after treatment, purified water is run off and can safely be drained into rivers. The solid material remaining is usually processed into fertilizer, after further treatment to make sure it contains no dangerous microbes.
Waste from our toilets, baths and washing machines is collected in sewers and carried to a treatment plant. Bacterial action breaks down solid waste into a harmless form, and the waste is stirred in huge pools while this process takes place. after treatment, purified water is run off and can safely be drained into rivers. The solid material remaining is usually processed into fertilizer, after further treatment to make sure it contains no dangerous microbes.
Eight New Places to Have Great Sex
Chances are, you've had your fair share of out-of-bedroom experiences -- booty in the bathtub, getting it on in
your car. But in the name of erotic exploration, here is the list of lusty locales you may have yet to discover. "Incorporating a new venue into your routine can stimulate your sex life and keep it exciting," says Carole Altman, Ph.D., author of Electrify Your Sex Life. So add these original hot spots to your places "to do it" list.... Just make sure no one's looking.
1. A golf course: When on the green, take a time-out for a, er, hole in one. Explore the outskirts of the course for a thunderstorm shelter. These shedlike structures are usually placed in remote areas and, unless it starts to pour, no one's going near them. You may also want to sport a cute little golf skirt to allow for easy access.
2. In front of the fridge: Kitchen carnal action may be nothing new to you, but the icebox might be uncharted territory. Open the door to the refrigerator and have your man sit on the floor with his back against the cool shelves. Then straddle him. Not only will the cold air give you both a thrill (you'll surely perk up!), but you can also incorporate food into your frisky play.
3. A rowboat: Turn an ordinary day by the lake into an erotic excursion. Rent a boat and row it out to a remote area free of people. Once there, get into missionary position -- which allows you both to stay low and out of view -- and try to make some waves.
4. The hood of your car: You can put a new spin on this classic hookup spot by getting out of the backseat. Spread a blanket on the hood and have an old-school romp under the stars.
5. A farmer's field: Take a little inspiration from the movie Match Point and have sex in the tall grass you see by the side of the road when you're taking a spin in the country. You'll be hidden while you enjoy a roll in the hay.
6. A sleeping compartment on a train: If you've ever wanted to make out in a moving vehicle, a train is the way to go. You'll have to pay a little extra to get your own berth, but you can use the private area as your exclusive passion playground. All aboard!
7. On a hike: To get it on in the great outdoors without having to lie down in the dirt, search for a big boulder you can hide behind so you're not visible from the trail. With your back against the rock and your legs wrapped around your man's waist, you can enjoy standup nooky as well as the scenery.
8. An exercise bench: If your guy has a home gym, use it to work up a sweat. The bench is the right balance of firm and soft, plus it puts you in perfect alignment for girl-on-top sex. Have him lie down, then lower yourself on top of him, using your legs to move up and down.
your car. But in the name of erotic exploration, here is the list of lusty locales you may have yet to discover. "Incorporating a new venue into your routine can stimulate your sex life and keep it exciting," says Carole Altman, Ph.D., author of Electrify Your Sex Life. So add these original hot spots to your places "to do it" list.... Just make sure no one's looking.
1. A golf course: When on the green, take a time-out for a, er, hole in one. Explore the outskirts of the course for a thunderstorm shelter. These shedlike structures are usually placed in remote areas and, unless it starts to pour, no one's going near them. You may also want to sport a cute little golf skirt to allow for easy access.
2. In front of the fridge: Kitchen carnal action may be nothing new to you, but the icebox might be uncharted territory. Open the door to the refrigerator and have your man sit on the floor with his back against the cool shelves. Then straddle him. Not only will the cold air give you both a thrill (you'll surely perk up!), but you can also incorporate food into your frisky play.
3. A rowboat: Turn an ordinary day by the lake into an erotic excursion. Rent a boat and row it out to a remote area free of people. Once there, get into missionary position -- which allows you both to stay low and out of view -- and try to make some waves.
4. The hood of your car: You can put a new spin on this classic hookup spot by getting out of the backseat. Spread a blanket on the hood and have an old-school romp under the stars.
5. A farmer's field: Take a little inspiration from the movie Match Point and have sex in the tall grass you see by the side of the road when you're taking a spin in the country. You'll be hidden while you enjoy a roll in the hay.
6. A sleeping compartment on a train: If you've ever wanted to make out in a moving vehicle, a train is the way to go. You'll have to pay a little extra to get your own berth, but you can use the private area as your exclusive passion playground. All aboard!
7. On a hike: To get it on in the great outdoors without having to lie down in the dirt, search for a big boulder you can hide behind so you're not visible from the trail. With your back against the rock and your legs wrapped around your man's waist, you can enjoy standup nooky as well as the scenery.
8. An exercise bench: If your guy has a home gym, use it to work up a sweat. The bench is the right balance of firm and soft, plus it puts you in perfect alignment for girl-on-top sex. Have him lie down, then lower yourself on top of him, using your legs to move up and down.
Monday, February 26, 2007
What is a human egg cell?
The ovaries of a newborn baby girl contain about 250,000 egg cells. By the time she reaches maturity, there will be about 10,000 remaining, However, only a few of these eggs will be used - one each month throughout the years when she can have a baby. Every 28 days, a swelling appears on an ovary. This releases the egg cell then enters the fallopian tube. The swelling it emerged from produces hormones to prepare the womb to receive the egg.
Each month, an egg cell is released from the ovary. When this happens, the lining of the womb changes so that it is ready to receive the egg if it is fertilized.
If the egg is not fertilized, the womb lining brakes down, and blood and tissue pass out through the vagina. this process is called menstruation and it happens about every 28 days. The time from one period to the next is known as the menstrual cycle.
Hormones from the pituitary gland and the ovaries control the menstrual cycle, which maybe irregular. However, it usually settles into a regular cycle.
Each month, an egg cell is released from the ovary. When this happens, the lining of the womb changes so that it is ready to receive the egg if it is fertilized.
If the egg is not fertilized, the womb lining brakes down, and blood and tissue pass out through the vagina. this process is called menstruation and it happens about every 28 days. The time from one period to the next is known as the menstrual cycle.
Hormones from the pituitary gland and the ovaries control the menstrual cycle, which maybe irregular. However, it usually settles into a regular cycle.
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