Basic Idea on Week by Week Pregnancy Trimesters

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Are you looking for some authentic information regarding pregnancy weeks? You are at the right place, as in this article you will come to know about week by week pregnancy trimesters and the different stages of pregnancy. It is a matter of fact that the duration of pregnancy is divided into 3 differential phases. Each phase is unique in its significance and duration. These phases are medically termed as pregnancy trimesters. The First Trimester covers the first fourteen weeks which involves the early growth and development of the infant. Most of the major organs are formed y the 12th week of pregnancy and the remainder gestation period (pregnancy) is taken up by growth. The preceding weeks from 15 to 26 are categorized into the Second Trimester during which the infant is termed as a complete fetus. Lastly, the final stage is known as the Third Trimester which initiates from 27th week and lasts till the 40th week. Thus, the total gestation period (pregnancy) usually lasts for 280 days.

The detailed information about pregnancy weeks is given below:

Week 1 & 2

The first two weeks is that particular duration which involves the period before pregnancy. The female body prepares itself for the process of ovulation. Furthermore the process of fertilization takes place in the first two weeks when female egg is fertilized by the male sperm.

Week 3

During the third week, the fertilization of egg is finalized and the fertilized egg is then transferred to the fallopian tubes and the zygote (ball of cells) is divided into two following the process of meiosis. The inner layer of cells leads to the formation of the baby whereas the external layer forms the placenta. The zygote enters uterus where it is conceived and undergoes further development. On the other hand, placenta functions for the exchange of oxygen, carbon dioxide, waste, nutrients and other materials.

Week 4

This is the week when your body transfers such symbols to your brain which reveals the fact about your pregnancy. The development of amniotic cavity and yoke sac begins to take place which results in the development of infant’s digestive tract in the subsequent years. On the 27th day, you will begin to experience morning sickness and nausea frequently.

Week 5

This is a developmental stage when different major organs of the infant begin to develop such as spinal cord and fore runner of the brain. Collectively these two major developmental phases is known as primitive streak. This primitive streak is further divided into three different layers of cells i.e.

• Endoderm layer – The lower most layer
• Mesoderm Layer – The middle layer
• Ectoderm Layer – The upper most layer

These 3 layers further develop all the organs of the infant whereas a cluster of remaining cells develops the spinal chord. Another major contribution which occurs during the 5th Week is the development of the baby’s head and blood cells.

Week 6

Week 6 gives you a wonderful feeling when your doctor informs you about the initiated heartbeat of your baby due to the formation of aorta artery which was formed during the 40th day of pregnancy

Week 7

Your little infant will truly become a baby now as during this week he/she will double in size. The eye lenses and a visible tongue are already developed and the jaws are also prominently recognizable in the modern ultra sound machine.

Week 8

The developed muscles will now show precise movements which can often felt by the mother in the later phases. The foot plates and wrist areas are also developing followed by the formation of teeth buds. A pigment appears on the eye retina which is another developing series of the infant’s eyes.

Week 9

This week can sound interesting for the mother when she will come to know that the development of sex organs have initiated which can reveal the gender of the baby in the subsequent weeks. The bones, heart chambers and fingers will be visible and baby will turn into an active infant.

Week 10 – 20

The embryo has converted to a full fledge baby and your morning sickness will be over powered by an increased appetite. During the 17th, week you baby’s weight will be increased by 6 times. You will now be able to comprehend the movements of your infant inside your belly which gives you an immense pleasure and a warm feeling of love. During the 19th week your baby will be covered in a creamy substance which acts as a protecting sheild for the infant. Now you are free from the danger zone of first 3 months of pregnancy which are often troublesome for majority of the mothers.

Week 21 – 30

The amniotic fluid of the pregnant mother will keep on replacing with the new one during the beginning of 21st week. The movements of the baby will be felt more often than before as the bones and muscles have become stronger with the passage of time. The heartbeat of the baby will no longer require a Doppler as it can also be detected with a stethoscope now. The wrinkled skin of the infant will begin to get smooth as more and more fat accumulation takes place during the preceding weeks. With the development of blood capillaries, a reddish pink tint can be observed in the complexion of the baby. It should be marked that after 28th week, a premature baby is likely to survive due to the development of major organs such as lungs and heart. Your baby will re-store the essential nutrients from the mother during 30th week of pregnancy.

Week 31 – 40

These weeks will serve the purpose of finalization in developmental process for the baby. Doctors usually increase the amount of folic acid, iron and calcium in order to ensure proper maturation of the internal organs. The immune system of the infant grows stronger to fight against the foreign bodies. The pressure on your bowels will increase as the baby will take a head down position, giving you a feeling of constipation. Your young one can enter the world 2 weeks before or after your pregnancy due date. At 39th week of pregnancy, your baby will adjust itself to your pelvis which can sometimes give you a feeling of off balance. Finally your baby will arrive anytime during the 40th week with the beginning of labor and if you haven’t given the birth to your infant yet then your doctors will probably give you artificial pains and the new born baby will enter a new world in a safe and sound manner.

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