A Complete Information Guide on Pregnancy Week 5

Missed your periods? Thinking to take Pregnancy test? You will receive good news through your home pregnancy test. In Pregnancy week 5, embryo has started to form major organs like heart, stomach, liver, kidneys and along with nervous system, circulatory and digestive systems.

We understand how happy you will be when those 2 beautiful lines/plus sign show up, a good news knocks in your life for lifetime and declaring you being “Pregnant”… Share this happy news with your husband.

During the 5th week of pregnancy, hCG (Human chorionic gonadotropin) levels are quite enough to show you a positive result of your pregnancy. Human chorionic gonadotropin (hCG) is a hormone produced by the placenta after implantation (Pregnancy week 4 is the implantation stage). Five-week pregnant means about one month pregnant, so eight more months are still there to enjoy the adventurous phase of pregnancy.

The first trimester is crucial for pregnancy, so being in the 5th week of pregnancy, you should know about your fetal development, your moods and accompanied symptoms and what you should do and not do during the 5th week of pregnancy. So, let us check this out.

Pregnancy week 5

Fetal Development in Pregnancy Week 5: 

In Pregnancy week 5: 

  • Size of baby/embryo – 0.13 inches (3.3 mm) from head to bum   
  • Weight of baby – less than 1 gram
  • Baby is about the size of an Apple Seed from a Poppy Seed.

With the passage of each week; your baby will grow in double size. Your belly will not change in its look but a bloated feeling near to an abdominal area is obvious.

From this week on wards, you may observe that you are gaining your pregnancy weight, which is actually a good sign. A weight gain in pregnancy totally depends upon your Body Mass Index (BMI). Your doctor will guide you that how much weight you should have in each trimester.

  • Your 5 weeks embryo has started to form major organs like heart, stomach, liver, kidneys and along with nervous system, circulatory and digestive systems.
  • The primitive placenta and umbilical cord is getting developed which is needed to provide the proper nutrition to the growing embryo.
  • Your baby is getting feed from yolk sac as placenta isn’t fully developed yet.
  • In this week, the neural tube will also start developing. It is from this that your baby’s brain, spinal cord, nerves and backbone will grow.

Your doctor may ask you for your first pregnancy ultrasound sonography. This ultrasound will give you an expected due date for delivery and the overall information about the fetal development. 

To-Be Mom! Eager to find out when your baby will arrive? Use Budding Star’s Pregnancy Due Date Calculator to know this by entering the first day of your last period. 

Pregnancy Due Date Calculator

Note: Remember Pregnancy is measured starting with the first day of your last menstrual period.

Pregnancy week 5                                                                Image courtesy: weheartit.com

Moods & Symptoms in Pregnancy Week 5:

In throughout the pregnancy, hormones have got a major role to play. The change in estrogen maintains the required level of progesterone and hCG level. Progesterone helps in the proper functioning of a placenta and stimulates the breast tissue and hCG supports the corpus luteum which gives the nourishment to the growing baby.

As your body undergoes with a regular change in hormones, the mood & symptoms also get changed. They are as follows:

  • Mood Swings – Sometimes you may feel low and depressed, and sometimes you feel that you are getting annoyed at the silliest thing. These are nothing but the mood swings and this behavior comes due to the change in hormone level.
  • Food Aversion – Sometimes you will feel that the food you liked very much now you don’t like it at all. Sometimes you will not feel good about the smell of any food. This is just because of hormonal change which leads to food aversion.
  • Morning Sickness – Morning sickness is experienced by near about 90% of the women till the first trimester. Morning sickness can be in the form of vomiting or either nausea. You will feel physically sick and dizzy.
  • Tiredness / Fatigue – This is a most common symptom of the first trimester of pregnancy. From 5th week of pregnancy on wards, you will feel that you’re getting exhausted soon and feeling very dull and low. All-time feeling sleepy and not so energetic to do daily household chores. This symptom remains until first trimester.
  • Sore Breasts – Aching Boobs is also a symptom of 5 weeks pregnant.

Do’s and Don’ts in Pregnancy Week 5:

You should be more attentive to your daily lifestyle routine now. Please follow the following chart of Do’s and Don’ts (important tips for Pregnancy week 5) for better understanding:



Keep continuing your prenatal vitamins with Folic acid (400 mcg) every day. (In case you are overweight or diabetic or carrying twins or in previous pregnancy the baby had Neural Tube defect (NTD), then the amount of folic acid given by your doctor is relatively different.)

Stop eating certain foods which can lead to food-borne illness, such as under-cooked meat, unpasteurized milk and certain fish.

Start having iron and calcium supplements too. You can consult your gynecologist for the same.

Stop consuming alcohol, chewing tobacco, smoking and excessive intake of caffeine. Be in safe surroundings too.

Follow an appropriate exercise or yoga routine which is good for your health.

*Do not consume any medicine which is not prescribed by your gynecologist.

Eat nutritionally balanced diet. 

Read “Diet During Pregnancy” to get the best foods for pregnancy and know how these foods will benefit you and your baby.  

Do not take stress or exertion. Do not skip any meal also.

Stay hydrated. Your water intake must be 3 litres (10-12 glasses) in a day.

Don’t pull or push heavy objects. Don’t carry your elder baby (if you have). It can lead to lower abdominal pain.

You can have soaked almonds (just 5-6). (Keep 5-6 almonds in the bowl having water in night. Then have that soaked almonds in the morning.)

Don’t consume Dry fruits.

Note: *Do not consume any medicine which is not prescribed by your gynecologist. In case of emergency, consult your doctor before consuming any medicine. Some medications in pregnancy are safe and some are not. Please never hesitate to take advise from your doctor. 

Below are the list of medicines which are safe and which are not safe during pregnancy for your reference:

Pregnancy week 5

Pregnancy week 5

Take very good care of yourself! Don’t Panic at all! Spend quality time with your husband and family. Start financial planning as one of the most important fact that is associated with new parenthood, is being responsible financially.

You may be interested in joining Facebook closed group only for Moms and To-be Mom’s to share your experiences and queries.

Here’s the link and be a part of it : https://www.facebook.com/groups/parentingmomstyle/

For your reference- Pregnancy Week 5:


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