Imagine a poppy seed. This is the size of your baby at 4 Weeks of pregnancy. It’s only approximately 2mm long, but there are some extremely complex processes going on
At 4 weeks of pregnancy is the time when the brain and the nervous system are starting to develop, and heartbeat can already be distinguished very well. The intestines and the lungs are also starting to develop, and day by day, week by week – the embryo develops into the baby it was always meant to be.
Brain Development at 4 Weeks
Between 4 and 5 weeks of pregnancy is a crucial time for brain development. The head of the embryo is approximately 1/3 of the entire size of the embryo. This is also the time when the cerebellum develops – that part of the brain which will later on be responsible for general body movement, coordination, and muscle movement.
The cerebral hemispheres also develop at this stage. The right and left hemispheres each play the crucial role in body functions such as memory, hearing, speech, thought, body movement, coordination and more. Your little miracle is in full bloom at this point, and will be for many months to come until all of these processes are fully developed, and the baby is ready to make their entrance into the outside world.
The greatest miracle is growing right inside your belly. You might not even know that you are pregnant yet, but that tiny poppy seed inside is developing its most important bodily functions.
How the Mother Experiences Pregnancy at 4 Weeks
At this point, you may or may not begin experiencing symptoms of pregnancy. However, many women believe their period is about to arrive, when in fact they are pregnant. Light bleeding or spotting can happen, but there is nothing to worry about.
If you took a pregnancy test and it came out positive, this is the time to make an appointment with an OB, and don’t forget to pay very good attention to your oral health. Teeth become vulnerable during pregnancy, and as you advance things can get worse if you do not pay attention to good dental hygiene.
If you haven’t started on prenatal vitamins, this is the time to do it. You need to take approximately 400mg of Folic Acid a day to protect yourself and your baby from certain diseases and problems.
At 4 weeks of pregnancy, the placenta and the umbilical cord are functioning. This means the embryo receives the oxygen and nourishment that you are providing. It is extremely important to pay attention to your dietary intake, because your baby receives its food/nourishment through everything you ingest
Things about your baby at 4 weeks of pregnancy:
The permanent kidneys will form by the time the baby hits 5 weeks
The tiny heart beats between 105 and 120 times per minute
The lungs are already developed
The placenta already has two layers at 4 weeks
By the end of week 4, the placenta is developed and ready to transfer nutrients + oxygen from you to the baby. You are in full connection with your tiny baby, and the cells of the placenta are channeling right into the linings of your uterus. The placenta now allows your blood to flow through small crevices so that you can start providing nourishment to the little one inside