Pregnancy week by week


Most women are pregnant (also called as gestation) in an average of 280 days, this process varies from woman to woman and growth rates also differ. Each week, new fetal developments take place as the mother – to – be’s body gears up with the progress.

Pregnancy-week-by-week

First trimester

Did you know that gestation primarily takes place in the 1st day of the last menstrual period (LMP)? The beginning of the first trimester is counted on this day forward because each time a menstrual cycle occurs, the body is preparing for pregnancy.

1 week pregnant

About the expectant mother

Did you know that pregnancy is not yet confirmed during the 1st week? This is because the body is still gearing up for ovulation and fertilization in preparation for a possible conception.

Gestation actually begins 2 weeks before conception. The LMP marks as the 1st day, then count towards 40 weeks to get the estimated due date.

About the unborn baby

Pregnancy week by week

The fetal growth and development does not begin during the actual conception, the fetus takes form about 2 weeks after the end of the LMP.

2 weeks pregnant

About the expectant mother

Ovulation occurs, it is when the ovary releases a ripened egg, travels down the fallopian tube, and is ready to be fertilized. Then the uterine lining thickens to accommodate the fertilized egg.

If conception failed to occur, the uterine lining and the unfertilized egg will shed resulting to menstruation.

About the unborn baby

Nothing has happened to the fetus yet.

3 weeks pregnant

About the expectant mother

Conception or fertilization occurs where the succeeding sperm meets the egg.

About the unborn baby

The fetus initially takes form as a tiny group of cells. Then the brain and spinal cord begins to develop.

4 week pregnant

About the expectant mother

The 4th week (between 4 – 7 weeks in general) is where many women find out that they are pregnant. This is also the week where a woman begins to feel various pregnancy symptoms, particularly cramping and vaginal spotting.

Contrary to that, most moms – to – be experiences no body changes yet during this week.

About the unborn baby

Implantation occurs, where the blastocyst (precursor to the fetus) splits into two to form the placenta and the embryo, and the major parts of the fetus begin to develop.

5 weeks pregnant

About the expectant mother

Morning sickness begins, and the hCG (human chorionic gonadotrophin) levels are high enough to confirm her pregnancy.

About the unborn baby

The fetus’s heart and circulatory system begins to develop.

6 weeks pregnant

About the expectant mother

Nausea and vomiting, breast changes, frequent urination, and pregnancy – induced heartburns (acid refluxes) will occur.

About the unborn baby

The fetus’s face is taking shape while her vital organs continue to develop.

7 weeks pregnant

About the expectant mother

Breasts begin to feel achy and itchy; morning sickness symptom may occur as she feels over – fatigued.

About the unborn baby

Every internal organ as well as his brain has begun to develop.

8 weeks pregnant

About the expectant mother

Morning sickness (which occurs any time of the day) will probably strike at week 8. A soon – to – be mother is also required to take her first pre – natal appointment this week.

About the unborn baby

The baby – to – be grows in size and begins to move inside the uterus.

9 weeks pregnant

About the expectant mother

Pregnancy – induced heartburns keeps a soon – to – be mother up all night; plus the hormonal surge which creates a lot of body changes.

About the unborn baby

Muscles begin to build up underneath the epidermis while he sucks his thumb.

10 weeks pregnant

About the expectant mother

Increase the fiber – intake since constipation is highly likely begins at week 10.

About the unborn baby

Bones and cartilages begin to form while most of his vital organs continue to mature.

11 weeks pregnant

About the expectant mother

An expectant mom must perform some Kegels.

About the unborn baby

The fetus is beginning to look like a human and is becoming more active.

12 weeks pregnant

About the expectant mother

A soon – to – be mother has probably doubled in size due to weight gain.

For working moms, this is the right week to inform her employer about her pregnancy.

About the unborn baby

The baby – to – be has gained weight.

13 weeks pregnant

About the expectant mother

The 13th week marks the end of the high –risk period while she starts to gain stretch marks.

About the unborn baby

A unique set of fingerprints begin to form.

Second trimester

At the start of the 2nd trimester, fetal developments are redefined.

14 weeks pregnant

About the expectant mother

1st trimester symptoms ease up a bit and the baby bump will soon protrude during this week.

About the unborn baby

Hair strands begin to sprout on his scalp, eyebrows, and body.

15 weeks pregnant

About the expectant mother

Unintentional slapstick and dizziness occurs. It is also advisable to sleep on the left side for optimum circulation and to ease the said symptoms.

About the unborn baby

Baby’s legs start to kick, elbows to flex but these are not yet strong enough for a mother to feel.

16 weeks pregnant

About the expectant mother

An expectant mom is glowing this week due to an increase blood volume.

About the unborn baby

Baby is experiencing growth spurt and a rapid eye development – eyesight and eyelashes.

17 weeks pregnant

About the expectant mother

Sciatic nerve pain may occur.

About the unborn baby

Baby practices his swallowing and sucking skills. Plus, adipose tissues (baby fat) begin to fill out underneath the epidermis.

18 weeks pregnant

About the expectant mother

Expectant mom begins to feel the fetal movements as the baby bump starts to show.

About the unborn baby

Baby constantly moves.

19 weeks pregnant

About the expectant mother

Belly is getting rounder resulting to round ligament pain, leg cramps and dizziness.

About the unborn baby

His skin is now protected with lanugo.

20 weeks pregnant

About the expectant mother

Plenty of iron consummation is a must.

About the unborn baby

Baby’s gender will be revealed.

21 weeks pregnant

About the expectant mother

Stretch marks increases.

About the unborn baby

Baby grazes on whatever his mom is now.

22 weeks pregnant

About the expectant mother

Morning sickness begins to subside however, edema strikes in.

About the unborn baby

The unborn is looking more like a newborn.

23 weeks pregnant

About the expectant mother

Linea nigra begins to appear.

About the unborn baby

Baby gets chubbier giving him higher chances of surviving outside the womb.

24 weeks pregnant

About the expectant mother

Navel begins to pop out.

About the unborn baby

Facial features are forming, brain develops rapidly, and lungs continue to mature.

25 weeks pregnant

About the expectant mother

Hemorrhoids begin to occur.

About the unborn baby

Fat build – up continues while he prepares to take his first breath.

26 weeks pregnant

About the expectant mother

Sleep deprivation strikes in.

About the unborn baby

His eyes finally open.

27 weeks pregnant

About the expectant mother

Edema still occurs.

About the unborn baby

Fetal movement gets stronger and harder.

Third trimester

3rd trimester serves as the final stage of gestation.

28 weeks pregnant

About the expectant mother

Same scenario continues.

About the unborn baby

Baby begins blinking and dreaming.

29 weeks pregnant

About the expectant mother

Varicose veins become visible.

About the unborn baby

Weight gain increases from ounces to pounds.

30 weeks pregnant

About the expectant mother

Joints tend to loosen up as she feels fatigue.

About the unborn baby

Baby’s getting smarter.

31 weeks pregnant

About the expectant mother

She experiences shortness of breath, Braxton – Hicks contractions, and leaky breasts.

About the unborn baby

Baby’s senses sharpen.

32 weeks pregnant

About the expectant mother

Braxton – Hicks contractions are felt.

About the unborn baby

Baby continues to hone his sucking and swallowing skills.

33 weeks pregnant

About the expectant mother

Amniotic fluid begins to discharge as she experiences over – fatigue and 3rd trimester insomnia.

About the unborn baby

Immune system gets revitalized.

34 weeks pregnant

About the expectant mother

Eye vision begins to blur. Doctors also recommend an expectant mom to do some perineal massage to prevent episiotomy.

About the unborn baby

Lungs are already fully – developed and his testicles have descended.

35 weeks pregnant

About the expectant mother

Shortness of breath and frequent urination occurs due to the fetus’s weight gain.

About the unborn baby

Brain development is at its peak resulting to a heavier head.

36 weeks pregnant

About the expectant mother

Braxton – Hicks contractions worsen.

About the unborn baby

Bones and cartilages continue to harden and mature.

37 weeks pregnant

About the expectant mother

Dislodging of the mucus plug, cervical dilation and effacement takes place.

About the unborn baby

He continues to practice his sucking and swallowing skills; and exercises his breathing movement.

38 weeks pregnant

About the expectant mother

An expectant mom could go into labor any time this week.

About the unborn baby

Most of his internal organs are fully operational. Add to that, his lungs begin to produce surfactant, a substance that prevents the air sacs from sticking with each other, while her milk ducts produce colostrum.

39 weeks pregnant

About the expectant mother

An expectant mom begins to experience definite signs of real labor contractions.

About the unborn baby

The unborn baby’s intellectual development is still at its peak and he could arrive at any point during this week.

40 weeks pregnant

About the expectant mother

Week 40 marks the end of gestation, a soon – to – be mom would probably meet her baby this week.

About the unborn baby

He might become an overdue baby if he is not going to be born this week.

41 weeks pregnant

About the expectant mother

Real labor contractions are highly likely to be experienced this week.

About the unborn baby

He is officially an overdue baby.

42 weeks pregnant

About the expectant mother

An expectant mom will certainly go into labor and delivery this week.

About the unborn baby

Baby’s post – term and overdue, and he will likely be awake once he is born.