Week 14 marks the start of the second trimester, but also the beginning of the foetal period, so starting now, we’re no longer talking about an embryo, but a foetus. It is fully formed, but it still has a lot of growing to do, and its development will become much faster.
How big is it?
At this stage the foetus is the size of a lemon, it should be 10cm long and weighs in at around 60g. Your tummy should become more obvious at this stage, and if people around you didn’t know that you are pregnant, they will now.
What does the body look like?
From week 14 of pregnancy onwards, the foetus’ body will grow faster than the head. The ears have moved to the sides of the head, the eyes got closer to each other, and now the neck is lengthening, the chin starts to lift and the roof of the mouth is fully formed. The hands and feet are more flexible and active, but you still can’t feel its movements.
Development of the internal organs
The baby’s heart beats twice as fast as that of an adult and the internal organs are developing fast: the liver begins to produce bile and the pancreas red cells. The lungs are not fully functional yet, and only amniotic fluid passes through them.
Now the brain is developing even more and its surface is visibly changing. Due to the impulses sent by the brain through the nervous system, also developed at this stage, the first facial expressions make their appearance. So, your baby will be able to frown, smile, yawn, sucks its finger and soon you’ll even be able to feel when it hiccups. The foetus can also open its eyes. The eyeballs are already formed and move in the eye sockets whenever they are stimulated by light or noise.
The reproductive organs are formed
On week 14 of pregnancy, the external sexual organs are visible, and can be seen by ultrasound. With girls, the ovaries move from the abdomen to the pelvis, taking up their definitive position and at the same time, the ovarian follicles begin to form.
The foetus’ thyroid matures and begins to produce hormones. The sweat glands are also developed at this stage and for boys, the prostate is already forming.