3rd Week Pregnancy – Formation Of Zygote

At the beginning of the 3rd week pregnancy, fertilization occurs. During the fertilization process, it is impossible to enter another sperm.

The fertilized egg splits until a solid ball of cell is formed. After that, it travels down into the fallopian tube and then into the uterus during the next seven days.There it implants into the uterine lining and it continues to grow and develop.

What are the physical changes that occur during 3rd week pregnancy?

During this week, you may experience some pregnancy symptoms, such as fatigue, frequent urination and swollen breast.

These symptoms are natural ones and there is nothing to worry about. Gradually you will lose some of the symptoms.

Vitamins you need to start at your 3rd week pregnancy:

During the 3rd week pregnancy, doctors will recommend you to start prenatal vitamins and week 3 is the perfect time to begin. Women with history of substance abuse, women expecting twins, or with lactose intolerance are at increased need of prenatal vitamins and supplements.

Calcium is also an essential vitamin during the pregnancy, because your body will use the calcium from your bones to build the bones of your baby. This is also a reason to get osteoporosis as you age. If you don’t get enough calcium in your child bearing years, then there is high chance of developing osteoporosis.

Increase the protein intake which is essential to build new tissues. Also make sure that you are getting a right dose of dairy products, legumes and green leaf vegetables.

Iron is essential during your pregnancy to increase your baby’s blood volume. Good sources for iron include: eggs, legumes, red meat, and green leaf vegetables.

So, it is better to contact your obstetrician to find the correct vitamins for you and your baby’s development.

What are the changes that occur in fetus during 3rd week pregnancy?

During the 3rd week pregnancy, your belly is still in the same size and shape. Instead of this, a wide variety of changes takes place in your body. During this week, your little zygote is 1.5-2.5 mm in size. This little zygote is composed of three complex germ layers: endoderm, ectoderm and mesoderm. It is very difficult to see germs at this period.

These layers are the initial stages for the formation of your baby’s nervous structure and brain, bones and connective tissue and stomach and internal organs. During this week, your baby will begin to attain an identifiable physical dimension, which is similar to a very small pear.

The round part of the pear will grow into the head and pointy part will become spine. At the end of this week, your little pear has a beating heart. The valves and heart chambers will not be completely developed for another couple of weeks.

By the end of this week, your egg moves into an embryo and it will be visible to the naked eye. At this point, embryo doesn’t look like a fetus or baby.