The skeleton consists of groups of bones which protect and move the body
One way to display a loading message is to place an image containing your message underneath the map tiles. The message is always there, but it’s not visible when the tiles have been loaded on top of it.
You have to place the image after the GMap2() object is created, because the API creates its own background for the map container when the GMap2() is created.
I suggest using low contrast, and allowing space at the side so that the message isn’t underneath the map controls.
A loading message placed underneath the tiles like this also becomes visible when the map changes zoom level or map type when new tiles need to be fetched
One baby in 100 is born with heart or circulation problems. With improvements in ultrasound scan techniques, most can now be detected while the baby is still in the womb
Causes of heart problems
It’s thought that most heart problems in babies are due to faulty genes. From conception, when sperm and egg combine, a complex construction process occurs to create a human embryo. We all carry a small number of faulty genes and if there’s a fault in the gene signalling, a structural heart problem may appear.
In small communities, where relatives are more likely to marry, there is less variation in the genes and it is more likely that both parents will carry the same rare genetic faults. This situation is known as a small gene pool, and it’s dangerous because genetic conditions such as heart abnormalities are more likely to occur. In larger communities, where there’s more mixing of different genes, genetic problems are less common.
A proportion of babies with heart malformations have problems with the chromosomes, which can be detected by tests during pregnancy, providing an early clue that the child may be at particular risk. For example, many pregnant women are screened for Down’s syndrome (where there are three rather than two copies of chromosome number 21), in which up to 40 per cent of babies are born with a heart problem.
There are other causes of congenital heart disease too. For example, mothers with diabetes have a two per cent chance of having a baby with a heart problem.
However, most of the babies born with heart problems don’t come from high-risk groups. The reason is simply that this is a comparatively rare, almost unpredictable condition – and there are only small numbers of high-risk people in the population.
Diagnosing heart problems
The majority of heart problems in babies are detected at a routine ultrasound scan, usually at 18 to 20 weeks, although some aren’t discovered until after the birth. If you have worries, talk to your GP or obstetrician. If they suspect problems, they may refer you to a specialist unit for further tests.
At about 19 weeks gestation, a baby’s heart is less than 1cm across and weighs only 1g or so (compared with 500g for an average adult heart). It also beats more than twice as fast as an adult’s.
The circulation of a foetus is different from that of a newborn baby, being connected to a placenta and having three extra channels that must close or reverse at birth.
Good-quality ultrasound equipment is essential to look at the tiny, fast-moving cardiac structures. Even so, ultrasound images appear grainy – it requires practice and an experienced eye to identify problems.
Advances such as the colour flow doppler detect the movement of red blood cells, highlighting areas of abnormal blood flow that may indicate circulation problems. These may have been missed by a conventional scan.
Second Trimester: The Baby at 16 Weeks
- Muscle tissue and bone continue to form, creating a more complete skeleton.
- Skin begins to form. You can nearly see through it.
- Meconium (mih-KOH-nee-uhm) develops in your baby’s intestinal tract. This will be your baby’s first bowel movement.
- Your baby makes sucking motions with the mouth (sucking reflex).
- Your baby reaches a length of about 4 to 5 inches and weighs almost 3 ounces.
Second Trimester: Changes a Woman May Experience
Most women find the second trimester of pregnancy easier than the first. But it is just as important to stay informed about your pregnancy during these months. You might notice that symptoms like nausea and fatigue are going away. But other new, more noticeable changes to your body are now happening. Your abdomen will expand as the baby continues to grow. And before this trimester is over, you will feel your baby beginning to move!
First Trimester: The Baby at 12 Weeks
- The nerves and muscles begin to work together. Your baby can make a fist.
- The external sex organs show if your baby is a boy or girl. A woman who has an ultrasound in the second trimester or later might be able to find out the baby’s sex.
- Eyelids close to protect the developing eyes. They will not open again until the 28th week.
- Head growth has slowed, and your baby is much longer. Now, at about 3 inches long, your baby weighs almost an ounce.
First Trimester: The Baby at 8 Weeks
- All major organs and external body structures have begun to form.
- Your baby’s heart beats with a regular rhythm.
- The arms and legs grow longer, and fingers and toes have begun to form.
- The sex organs begin to form.
- The eyes have moved forward on the face and eyelids have formed.
- The umbilical cord is clearly visible.
- At the end of 8 weeks, your baby is a fetus and looks more like a human. Your baby is nearly 1 inch long and weighs less than 1/8 of an ounce.