Pregnancy Week By Week

Pregnancy week by week is a time of very fast growth and organ development for your baby. The growth of your baby (also called a fetus). during pregnancy usually follows a very predictable pattern. you can see the different stages of fetal growth and development during week by week. All measurements are averages.

Pregnancy week by week is divided into three trimesters:
First trimester – conception to 12 weeks
Second trimester – 12 to 24 weeks
Third trimester – 24 to 40 weeks.

Pregnancy Week 2:

At the start of this week, you ovulate. Your egg is fertilized 12 to 24 hours later if a sperm penetrates it. Over the next several days, the fertilized egg will start dividing into multiple cells as it travels down the fallopian tube, enters your uterus, and starts to burrow into the uterine lining.

medical accurate 3d illustration of a fetus week 5

Pregnancy Week 5:

Two-chambered heart:

Your little one now has a two-chambered heart
which basically looks like a tube that is twisted
back onto itself.

Heart beat:

The heart starts beating on or around day 21
after conception (day 35 of pregnancy).

Spinal cord:

Your baby’s spinal cord is beginning to form,
and your baby is growing a thin layer of skin to
cover everything up.

Pregnancy WEEK 8:
Reproductive organs:

This is the week that your baby’s reproductive
organs will either become testes (it’s a boy!) or
ovaries (t’s a girl!).

Heart development:

The heart has now developed into a tiny replica
of a fully grown adult heart with four chambers.

Bone development:

The bones of your baby’s arms and legs start to
firm up and the trunk straightens.

Pregnancy WEEK 9:
Fingers and toes:

The fingers and toes become properly separated,
losing any webbing.
The eyes:
The eyes are moving from the side of the
head to the front, where they will eventually be
Joint development:
Bone development continues, and you can even
start to see joints.

Pregnancy WEEKs 10:
If you could touch the little fingers you could feel
that tiny fingernails are beginning to form.
The placenta:
This week blood will begin circulating between
the uterus and fetus and the placenta will start

Vital organs:
The risk of congenital defects becomes less now
as the vital organs are fully formed.

Pregnancy WEEKs 12:
Sucking movements:
Your baby now has the ability to open and close
its fists and to make sucking movements.

Organ development:
All the organs are developing into their final
shapes including the stomach, liver, pancreas,
and intestines.

The lungs:
Your baby’s lungs are practicing breathing with
amniotic fluid. The lungs won’t breathe oxygen
until birth.

Pregnancy Weeks 14:

Now 3/12 inches long, the young one is coordinated enough to find his or her thumb and suck it. fingernails and toenails are beginning to grow. the baby is aloso able to swallow and urinate.

20 weeks of Pregnancy:
the fetus is now about 10 inches long from head to heel and weighs 11 ounces. the baby has unique waking and sleeping patterns and even has a favorite position to sleep in. the pregnancy is about half over, and the mother is beginning to show. studies indicate that babies can feel pain at 20 weeks, and possibly even earlier.

24 weeks of Pregnancy:
the baby now wwighs approimately 1 1/2 pounds and inhales amniotic fluid in preparation for breathing. the ear has developed to the point where the baby recognizes his or mother’s voice, breathing and heartbeat. the baby may have a blink-startle response resulting from sound applied to the mother’s abdomen. some babies born at this stage of development are able to surive.

28 weeks of Pregnancy:
Eyelashes and eyebrows are
present. The fetus has a good head of hair.

The thin, red, wrinkled skin of the
fetus is covered with a white
cheese-like substance called vernix.

Approximately 91% of the infants born at this age will survive if born at a hospital that provides expert high-risk newborn care.

32 weeks of Pregnancy:
The fetus continues to grow and
Toenails are fully formed. The body is filling out or
“fattening up.”
The fetus is now approximately 16 inches long, about the length of a
football, and weighs 3 to 4 pounds.

36 weeks of Pregnant:

The fetus has fully-formed limbs
with fingernails and toenails. Muscle tone is developed and the
fetus can turn and lift its head. The fetus has soft earlobes with
little cartilage.
The fetus is about 19 inches long and weighs about 5 to 6 pounds. An infant born at this time has an excellent chance of survival with proper care.

40 weeks of Pregnancy:

Congratulations on 40 weeks! Your baby is ready to be born. Your baby’s had time to fully develop and is ready to meet you face to face. Call your provider when you think you’re in labor. Your baby is about 18 to 20 inches long and weighs about 6 to 9 pounds.


Pregnancy week 40

#pregnancy #weekbyweek

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