The baby’s hands (one of which is seen here) and feet are gradually developing and they are formed of cartilage, not bone, at this early stage. At right, the fused rays of the hand plate that will become the fingers can be seen.
Who will your baby look like? His unique facial features are beginning to take shape this week.
If you were to have an ultrasound scan this week, it would be possible to recognize several of your baby’s facial features.
His eyelids fuse and will remain closed until around the 26th week. The lips have already formed and with the surrounding skin will have the greatest concentration of nerves. The muscular tongue arises from the base of your baby’s mouth, but it will be two weeks before the first taste buds appear. The hard palate that forms the roof of the mouth arises from two “shelves” that start to grow, one each side, beneath the tongue; these shelves will lift upwards to join horizontally, allowing the tongue to drop down into the mouth. Once they have joined together, the septum of the nose grows downwards to meet them.
Your baby’s tiny tooth buds are in place and this is critical to adequate jaw development. One branch of tooth buds will form the first milk teeth and a separate branch will eventually form the permanent teeth. The milk teeth develop slowly and it will not be until the sixth month of pregnancy that they acquire their hard enamel coating.
The embryo is still very curled up, with the head resting on the chest. Over the next two weeks, as the jaw and neck grow, the head will gradually lift.
I work for a dry cleaner. Could the chemicals harm my unborn baby?
Concerns about dry-cleaning chemicals stem from research showing that women who operated dry-cleaning machines had a higher risk of miscarriage. If touched or inhaled, some organic (carbon-containing) solvents used in dry-cleaning machines can pass through the placenta and some are thought to increase the risk of miscarriage or birth defects.
Talk to your employer to find out how your duties can be changed for the duration of your pregnancy to limit your contact with organic solvents and industrial chemicals.
Having immunity against common infectious illnesses will protect your unborn baby. You may have natural immunity from having conditions such as chickenpox and slapped cheek syndrome as a child. You will almost certainly have been vaccinated against mumps and measles, so your unborn baby will be protected from these.
If you are unsure about your immunity or medical history, or think you may have been in contact with any of these infections, contact your doctor or midwife immediately for further advice. He or she will be able to do a checkup and provide reassurance.
If you are in regular contact with young children while you’re pregnant, it’s even more important that you check your immunity to childhood illnesses.
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