The fetus begins to produce urine and hormones, and
the entire skeleton is formed. The pressure on the
bladder becomes less and maybe the desire to exercise
The fetus in week 13
The fetus is now 11 weeks old. It is 8.5 inches long
and weighs around 35 grams.
The entire skeleton has been formed, but much is
cartilage. The process of curing the cartilage, that is,
making it bone, continues almost all the way to birth.
The fetus has also begun to produce its own hormones in
the pancreas where insulin is formed. The thyroid gland
is also fully developed.
It can be seen that the fetus's face is now beginning
to take on human forms, partly because the eyes come
closer. The brain develops steadily, and the fetus
begins to produce urine as it pours into the amniotic
fluid. The fetus swallows this urine along with amniotic
fluid, but the urine is sterile - and this is something
that all fetuses do.
The fetus will react if you push gently against the
uterus - even if you still cannot feel it moving.
Being pregnant in week 13
Pregnancy has now entered the second trimester, which
for most people means that the pregnancy problems become
smaller and easier to live with.
Perhaps one of the biggest reliefs is that the nausea
for most pregnant women is now diminishing. The pressure
on the bladder also decreases, so you no longer have to
pee "all the time". This is because the uterus rises
upward from the pelvis and instead grows upwards in the
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But the pregnancy hormone progesterone causes food to
pass more slowly through the digestive system, which can
cause constipation. The growth of the uterus can also
cause so-called ligament pain. They are completely
harmless. But if in doubt, double check the pain of a
doctor or midwife.
Maybe you've got a dark string from the navel down?
This is called linea fusca and disappears some time
after you give birth.
Good tips for week 13
Since most pregnant women on the whole experience
less pregnancy problems now, it is recommended to
exercise. Along with high fiber foods and enough liquid,
regular exercise can help digestion to avoid
constipation. Pregnant women who exercise also
experience both pregnancy and childbirth as being easier
than those who do not exercise, and the activity
prevents pregnancy poisoning. You should still avoid
contact sports such as martial arts, football and
handball. Also, keep your workout to a moderate level
and do not push your body too hard.
Instead of sleeping on your back, it may be wise to
find another sleeping position in the future. When lying
on your back, pressure on the organs and blood vessels
Things to think about
If you are entitled to early fetal diagnosis, week 13
is the second last opportunity to take a so-called KUB
test. This is the only test form that does not pose a
risk of miscarriage, but it does not produce 100 percent