 
This is an ultrasound examination that is usually carried out through the vagina. The scan aims to determine the number of fetuses present and whether the pregnancy is progressing normally inside the uterus/womb....
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Most pregnancies are normal, but
some have problems. The most common problem is miscarriage, or the much rarer
problem of an ectopic pregnancy. If a woman has bleeding in early pregnancy, or
abdominal pains it is helpful to have a scan....
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Sadly about 20% of pregnancies end
with miscarriage. Sometimes the pregnancy tissue will all come away naturally,
but often the there will be pregnancy tissue to see on scan. When this happens
there are 3 ways to manage the situation....
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BHCG levels and pregnancy
gestational age – you can see that the levels are very high but we can usually
see a gestation sac in the uterus at 5 weeks or HCG level of 1000, a yolk sac at
3000 and a heart beat once the HCG is greater than 5000....
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Progesterone.The hormone
progesterone helps to build the lining of the woman's uterus for the fertilised
egg to implant into. Pregnant women have about 10 times more progesterone in
their blood during pregnancy (compared to when they are not pregnant).
Progesterone levels slowly increase as the pregnancy progresses....
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For the first ten weeks of pregnancy, the fertilized egg is called the "embryo." The embryo develops from an egg fertilized by the sperm. It begins as one cell, which divides into two cells by the time it descends from the fallopian tube into the uterus. These cells divide further until they form two groups - one making up the wall lining of the embryo to become the placenta and the second becoming the embryo itself....
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