At this early stage of pregnancy, you may start to notice some pregnancy symptoms have kicked in. This can include morning sickness and fatigue.
At 4 weeks, your baby will be developing from a blastocyst into an embryo.
How Big Is Your Baby?
At four weeks, your baby is less than 0.05 inches long.
For reference, this is about the size of a poppy seed.
Your Baby’s Development
At four weeks, it will be almost impossible for you to see your baby should you go for an ultrasound as they are so small.
Even though they are so small, there is actually a lot going on within your baby at this early stage and there is a lot of development to be had here.
During this stage, the fertilized egg has implanted itself into your uterus and it is quickly beginning to grow.
Here are some other things you can expect for your baby during this stage:
Splitting In Two
At four weeks, the blastocyst, which is essentially a collection of cells, is splitting. This will eventually turn into your placenta, which is a whole new organ, and an embryo which is the beginning of your baby.
Preparing For Development
Even though your baby is currently a tiny spec of being that will be almost impossible to see, there is a lot of development starting on the inside.
The gestational sac that carries the blueprints for your baby’s nose, toes and essentially every other body part is hidden in their chromosomes and it just waiting to develop.
Your Body: Am I Pregnant?
At four weeks you will likely start to notice some of the first pregnancy symptoms. This is typically the time when women find out that they are going to have a baby as their bodies start to go through some changes.
These are some of the pregnancy symptoms that you may start to notice at this stage:
Is It PMS?
In these earlier stages of pregnancy, it can be quite hard for women to determine whether they are suffering from pregnancy symptoms or their usual PMS.
This is because moodiness, fatigue, sore breasts, bloating and constipation can all be signs of both your upcoming period or that you are pregnant.
However, there is a significant difference between the two – PMS symptoms will typically go away once you have gotten your period, but pregnancy symptoms will linger.
In fact, pregnancy symptoms can actually linger throughout the entire first trimester.
This means that if you are not sure whether you could be having a baby or not, then you will need to take a pregnancy test. This is the only way to know and you should do it sooner rather than later.
Four weeks is a very early stage of pregnancy, so much so that you may not even feel pregnant yet.
However, a missed period is usually a good sign that you are going to be having a baby so you will need to make sure that you are keeping track of your periods.
You will need to know when you are next due to come on in order to see whether you have missed your period or whether it is just a bit late.
If you feel like you have missed your period, now is a good time to take a pregnancy test.
Positive Test Result
Some home pregnancy tests can give you an accurate result even at this early stage, but it can actually take a couple of days or weeks before it can read the hCG in your urine.
This is the pregnancy hormone that is detected by pregnancy tests and will give a positive result.
If you think that you might be pregnant but have had a negative test result at home, you should make an appointment with your healthcare provider. They will have better technology that will be able to determine whether you are pregnant even at this early stage.
You can also try another at-home test to see if the result has changed within a few days.
One of the first pregnancy symptoms that women notice is sore breasts. This is something that is likely to appear even before vomiting and fatigue.
It may be hard to believe, but sore breasts can be a sign that your body is getting ready to feed a baby even at such an early stage.
Fatigue And Low Energy
Fatigue is such a prevalent pregnancy symptom because lots of hormones will surge and your body will start to produce more blood which will be used to nourish your baby.
This means that you will feel tired a lot of the time when you are pregnant and this can start even at such an early stage.
You may feel exhausted and like you have no energy, no matter how much sleep and rest you get.
A large percentage of women (around 30%) will experience implantation bleeding when the embryo attaches itself to the wall of the uterus. This is why you may experience some spotting at the early stages of pregnancy.
The blood that you may find in your pants at this stage tends to be a different color from that you see during your period – it can be a light pink or a dark brown.
Implantation cramps are a thing that can happen when the embryo attaches itself to the wall of the uterus.
This is why you may experience some light cramps and aches at the early stages of pregnancy, but they should only be present for a couple of days.
First Trimester Symptoms
At four weeks you may not be experiencing that many symptoms just yet, but during the first trimester things will start to change.
This is because hormones surge and your body will start working to keep your baby safe.
You may notice the following symptoms in the next few weeks:
Around half of all pregnant women will experience morning sickness and this can sometimes last all day.
This symptom will usually appear at week six and may ease around week 12.
Aversion To Food
Feeling an aversion to food that you used to love comes hand in hand with nausea and this is another symptom of pregnancy.
This means that you may have to do a major overhaul of your eating habits to accommodate your changing tastes and soothe your nausea.
During weeks six to eight, you will be experiencing some hormonal changes and an increased blood flow which can cause the kidneys to produce more urine than usual.
This means that you will likely find yourself needing to go to the bathroom a lot more than normal.
During some of the early stages of pregnancy, there will be a slow-down in your intestines which can cause constipation.
The iron that is in the prenatal vitamins that you may be taking can also bung you up a little.
To ease yourself through this stage, make sure you are eating enough fiber, drinking water, and are getting exercise.