4th Week of Pregnancy | Pregnancy Week by Week

Your journey started and this is the 4th week, which is called implantation period. This time the blastocyst is on its way to the uterus to be settled in a perfect place for upcoming 36 weeks. The 4th week is the time is for the monthly period for a woman and the implantation normally happens around this time so you can have the experience of implantation bleeding but don’t worry this is not your regular period it can make slight spotting on your underwear. This light bleed can occur because the uterine wall is inflamed with blood now if you are 4 weeks expecting mom. According to some experienced mom, they say they really can feel the time of implantation of the blastocyst.

Maybe you are still doubtful that you possibly will be pregnant if this week your period doesn’t come. If you keep tracking your cycle date by maintaining a calendar that will be good for you in case you forget. You will notice some changes in your body and some early pregnancy symptoms like week 3. You will realize little changes to your body and emotion from as usual you do.

If you are officially 4 weeks expecting mom and you are feeling exactly the same like before then nothing to worry, your body is getting familiar with all of the changes.

By using home pregnancy tester you can confirm your pregnancy with the urine test. To get more accurate and perfect result try this home pregnancy tester in the morning when you wake up. The hCG hormone will be high in the morning.

Your Body Changes and common symptoms of 4th Week

  • Maybe you will feel some pregnancy symptoms at week 4. Some changes you might feel like implantation bleeding which is called light bleeding or spotting.
  • Since you are officially pregnant and you have a positive pregnancy result then you must need to visit a doctor to get your appointment for the regular check-up.
  • While you are booking for your appointment to the doctor you will be asked your details information including your partner's details and your family's pregnancy health history and you will be given details information regarding your health, nutrition, and wellbeing with what to do and what not to do etc. They will also help you to know about parental care.
  • They will also book your appointment with the doctor and a midwife as well. You should very careful about your every step from now even you can use a pregnancy due date calculator to know the tips and information details for each week.
  • By providing the first date of your last period you can easily calculate your due date. After conception, your blood flow is increasing. While you are an expecting mom it is also important to look after your teeth. You can visit your dentist as well. In some cases, you can face some problems like bleeding gum. If you see something like this you must take an appointment with your dentist.
  • The most common pregnancy symptom is implantation bleeding or spotting. You must be very careful about this at these early stages. Some women can be confused with this they may think they are having period or miscarriage. They might think are they really pregnant or they just have lost their baby.
  • The hCG hormone confirm your pregnancy test and it will start producing just after 6 days of your fertilization and within next 2 weeks, it will be detected by a pregnancy test. You need to keep in mind that the pregnancy test result at home cannot be always 100% perfect if you don't follow the proper instruction and the time. If the result is negative and you missed your period then you can test again after few days or a week. The result should be positive when the hormone level is high.

So this time your hormone level is increasing quite frequently and maybe you can feel some differences in your body. The common symptoms of the 4th week are given below:

  • This time your mood swing is the very obvious symptom. Sometimes you can be very emotional or your mood is mostly erratic because of the unstable hormones. First 12 weeks are extreme to the mood swing. After reaching 2nd trimester you will feel less emotional for your life events.
  • At this stage, you can feel cramping and a sense of fullness and you may feel bloated. Don’t worry this is the sign that your baby has implanted successfully to your uterus. If you feel it’s more than usual then you should let your doctor know about your pain. Your doctor will check is there any problems or not.
  • This week you may feel morning sickness or nausea. You generally love the food but can't take the smell. You might feel vomit even you didn't take any food for a while. When I was 4 weeks pregnant with my first child I couldn't take the smell of any fish, chicken and red meat. It can vary person to person but according to experts 50% to 85% of expecting mom get the morning sickness nausea and even vomiting. This can go to the worse situation around 8 or 9 weeks but don't worry it will disappear just after reaching 2nd trimester.
  • At the 4th week, you may notice your breast nipples become darken day-by-day and more sensitive. Your breast can be tender and soreness for the surging hormones. The mammary gland is getting ready for milk for your new baby.
  • You may see some light spotting on your underwear. This is called implantation bleeding as well and it may occur at 4th week. Nothing to worry it happens but if you see something unusual or bleeding like period or staying 2/3 days then immediately concern your doctor.
  • This time you may go to loo very frequently to wee. In this situation, the expecting mom can’t hold for a long time like usually does at the normal time and it is the just small amount. Your uterus pressure and blood volume are increasing than before and the uterus is pressing down on your bladder that is why it happens.
  • You have missed your period and you did the pregnancy test because you are thinking maybe you are an expecting mom but the tester shows negative results then nothing to be worried just talk with your partner and make an appointment with your doctor.

By this time your belly can belittle bloated but your belly doesn’t look like that you are pregnant. Now you are eagerly waiting to see your darling baby and you started behaving like mom-to-be. You have started shopping for your little one such as baby receiving swaddle blankets, the newborn record book, new-born photography props and many more. Your baby is started to developing so you must be taking your parental vitamins. Your body is changing so you need to stop wearing fitting dresses, skinny jeans. You can start wearing some comfortable loose fitting dresses such as stretchy pants and leggings you also can try some charming maternity shirts. 

This week the cells are splitting into many parts, which is called embryo and placenta. By this time baby’s brain, spinal cord, muscles, neural tube and backbone are formed already.

In your body, to protect your baby the fluid and the amniotic are founding protective cushioning. This time your baby is like a little dot, which is known as a gestational sac.

At these stages maybe your doctor will do some regular check-up and ask you for some tests to make sure there are no complications and then the next appointment date will be around after 1 month if things are going well with you.

So do relax, eat healthily, drink healthy and take lots of water along with your favorite author's favorite books and your Kindle

Baby Development and Changes in Week 4

By this week your baby is like the size of a poppy seed and still in embryonic period. This is the very early stage of your baby’s development in the mom womb.

At this stage, the embryo connects with the inner layer of the uterus, which is called womb or endometrium and start generating the hCG hormones. The hormone maintains the womb and doesn’t allow coming any more eggs for rest of the months.

Among three layers the outer layer named ectoderm is liable for the form of nail, brain, hair, mammary gland and nerve system.

The middle layer, which is known by mesoderm, will develop the heart, tissues, muscles, cardiovascular system, skeleton and the urogenital system.

And the third layer or inner layer is called endoderm forms the lungs, urinary system, liver, thyroid and the intestinal area.

This week the amniotic sac and the yolk sac are developed and the embryo is bordered with amniotic fluid by cushioning for support and protection. The amniotic sac provides a positive environment to the embryo. The amniotic sac is also called amnion.

On the other hand, the yolk sac is liable for the development of blood cellular mechanism.

The outer embryonic membrane starts developing placenta and the placenta is in an early stage. After full development, the placenta will provide oxygen and food to your baby as per her requirements. It will take around 10 weeks to develop until then the yolk sac will supply the needed food and nutrition for the embryo.

Enter your text here...The fertilized egg size like poppy seed and from the 3rd weeks the embryo heart starts beating. From the 4th week, the baby starts to sleep.

Embryo and Fetal Growth

Embryo and Fetal Growth

Baby Development table at 4th Week is given below

Embryonic Development

Development Stage at 4 Weeks

Blood cellular system

Blood flow starts

Arm Buds



Begins to beating and the rate is 105 to 121 times per minutes

Liver, pancreas, and gallbladder

Start appearing

Spleen organ



Start to appear

At 4 weeks you must be going to visit a doctor because you have missed your period and the doctor will ask you for few tests.

Food and Nutrition at 4 Weeks of Pregnancy

By now you already know that you are an expecting mom. You must know about the food and nutrition for your baby’s proper growth and development.

To build your baby’s body vitamin C is one of the essential. You need to increase taking vitamin C at this time of your pregnancy.

Luckily it’s easy to get some vitamin C supply from lots of fruits and vegetables. There is lots of benefit of vitamin C in pregnancy. To develop your baby’s tissues and organs vitamin C is very important.

Some benefits of vitamin C for an expecting mom

Vitamin C is one of the key nutrients for 4 weeks expecting mom including balanced diet. It helps to prepare your body to support your baby. It keeps the baby cells healthy and provides active collagen role. Collagen helps to form tissues, organs and blood vessels.

While you are expecting mom, your daily-recommended vitamin C is around 40mg until 2nd trimester. After reaching the third trimester you need extra 10mg vitamin C each day.

Vitamin C boost your immune system and at the same time it helps to reduce the risk of iron deficiency and for your baby’s physical development vitamin C is the crucial such as:

  1. It helps to produce collagen. Collagen is one of the main proteins essential for your baby’s growth in the womb and supports for bone development, regular growth, organs development and wound soothing
  2. It helps the immune system of your baby and keeps the cells nourishing. 
  3. Vitamin C keep your baby’s cells healthy and aids to your little one to absorb iron and make stokes for later use. 

Some vitamin C enriched foods list are given below which can help to increase your iron absorption such as:

  • Tomatoes
  • Spinach
  • Broccoli
  • Brussels sprouts
  • Kiwi fruits
  • Strawberries
  • Fresh fruit juice
  • Blueberries
  • Freshly squeezed lemon juice or lime juice

Some Benefits of Iron for an Expecting Mom

This time your body increases the blood supply to your body. The body needs more iron in pregnancy than your regular needs. Your body is maintaining and building a huge volume of blood cells and it will increase day by day as it grows so you will be required for iron. Besides these, your baby's body gets ready for first 6 months of her life so she starts gathering iron from the 3rd trimester of your pregnancy. Luckily, you had good iron levels before pregnancy then you are recommended to take same if you were not an expecting mom.

You keep more iron by storing in your body. Since you are expecting, your body is absorbing iron more effectively and this is a wonderful method of nature that your body unsurprisingly fulfills the changing demands of the developing new baby.

Spinach can be well sources of iron. Vitamin C helps to absorption of iron into your blood.

Iron is the main element of blood, which helps to supply oxygen towards your baby and all your body and this is essential for your baby’s usual intellectual activity.

Iron plays a very important role in your body for your own health and your baby's development.

Sufficient intake of food and nutrition can help to grow your baby rapidly and baby’s brain, muscles. Iron is required to produce and maintain the hemoglobin.

Following food are the good sources of iron, which can provide you sufficient iron while you are an expecting mom and following a healthy pregnancy diet,

  • Egg
  • Red meat and poultry
  • Fish
  • Wholegrain
  • Nuts and dry fruits
  • Dark vegetable such as brinjal
  • Green and leafy vegetables
  • Pulse

The food and nutrition is an important part of fit and perfect pregnancy. Pregnancy requirements can change person to person and some information can make you confused so always consult with your doctor if there is something unusual. You should increase drinking liquid at your early pregnancy because your body's blood flow is increasing so baby needs extra fluids so start taking plenty of water and freshly squeezed juices which can reduce your constipation. You should take skim milk as well.

Essential tips for the 4th week expecting mom

This is the time to visit a doctor so you should book your appointment and maybe your doctor will refer you to a midwife for your proper care.

Don't be upset about anything and try to escape overheated place because at early pregnancy high temperature can be risky for your baby.

It is not always necessary to fall you into a dangerous situation but you need to aware of all these possible risks of the 4th week, which are given below.

Risk of Miscarriage at week 4

In this stage of pregnancy, the risk of miscarriage is quite high. At this stage around 25% to 75% women have the chances of miscarrying. At the week 3 and 4, the miscarriage risk is high because if the implantation doesn't occur successfully. If the egg can't implant into the uterus after fertilization, then the pregnancy will terminate and as a result, it will end with the miscarriage.

Since you are pregnant at this week that means your implantation is done and your journey is started so nothing to worry.

Some possible signs of miscarriage at this stage

  • Severe cramping
  • If light spotting leads to heavy bleeding like a period
  • Long-term bleeding
  • Lower back pain
  • Passing of blood clots along with painful cramps

If you are experiencing any of these signs it doesn’t really mean that you had a miscarriage but you need to visit your doctor to make sure that you have miscarried or not. If not then the treatments can reduce the risk of miscarriage.

Ectopic Pregnancy or Complication of Pregnancy

At 4th week pregnancy, ectopic or complication pregnancy can occur. There is a chance. If the fertilized egg joins outside the uterus, not the inside then it can happen. The impanation place can be ovary or fallopian tube. The signs of the complications of pregnancy are exactly similar to normal pregnancy at the early stage. After passing some more weeks the sign can be distinct and the signs are given below.

  • Lower abdominal cramping
  • Faintness
  • Vomiting and heavy nausea
  • Sometimes can occur heavy bleeding

If you didn't start taking folic acid or multivitamins you must start to take these immediately. To avoid several birth defects vitamins are just compulsory.

You also need to take some food supplement for calcium, vitamin according to your doctor’s advice and depend on your body requirements. The following food you can add to your regular diet for calcium

  • Milk
  • Cheese
  • Yogurt
  • Leafy green vegetables

For vitamin D

  • Milk
  • Salmon fish

At this time you should avoid caffeine and alcohol. Stop taking too much salty and sugary food. You should say goodbye to fried, oily and junk food.

To become a mom is very exciting and changes a lot to your body and your life as well. You need to be very careful with the possible risk of your new mom journey.

You should start taking small meals but frequently to reduce morning sickness. Don't do fasting because it may affect your baby's development.

You should share your feelings to your partner let him know about your interest and distresses or how do you feel so that he can realize what you are going through and he can help you to feel well.

Don’t take any drugs or any medication without your doctor’s concern.
Try to stay relaxed and happy and enjoy with your friends and family and it is good to go out with your partner to enjoy the natural beauties.

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