While pregnant with my babies I wanted to know how they were growign each week... and I wanted to know what I might feel (and what was "normal"). This week by week pregnancy chart from PishPosh Baby has it all. My favorite feature? The chart goes to 42 weeks!
This week by week pregnancy chart covers fetal development from 4 weeks to 42 weeks - and it lets you know what pregnancy signs and symptoms you might experience that week. The chart also shows a picture of what your baby looks like and how your body changes throughout pregnancy!
Recent guidelines have made huge strides in health for our babies because they no longer consider 37 weeks as “full term” – instead, that's “early term.” Babies aren't “full term” until 39-40 weeks. And the guidelines also classify 41-42 weeks as “late term.” You're not “overdue” until after 42 weeks – so it's good to see a chart that lines up with that. Need more details on baby development? Click here for the full week-by-week series and baby development gallery.
Enjoy the infographic from PishPosh Baby:
1st Trimester
This is the time of the most rapid growth of your baby's life - and even if you don't see a baby bump, your body is going through remarkable changes, too!
4th Week of Pregnancy
- Bloating (due to increased progesterone)
- Mild cramping
- Bleeding
- Mood swings (due to fluctuating hormones)
What's Happening With Your Baby
- Your baby - now a Blastocyst - is the size of a poppyseed
- The ball of cells splits into the placenta and embryo
- Neural tube is already formed
- Protective cushioning made of amniotic sac and fluid is forming
5th Week of Pregnancy
- Sore breasts
- Nausea
- Fatigue
- Frequent need to pee (your kidneys start to enlarge)
What's Happening With Your Baby
- Your baby, in the embryo stage now, is approximately .13 inch (the size of a appleseed)
- Organs such as the heart, liver, stomach, and kidney start to form
- Digestive, nervous, and circulatory systems begin to form
6th Week of Pregnancy
- Exhaustion
- Nausea (remember it can last all day)
- Mood swings
- Sore breasts
What's Happening With Your Baby
- Baby is approximately .25 inch (size of a sweet pea)
- Blood circulation is more pronounced
- Face starts to develop
- Hands and feet start to form
7th Week of Pregnancy
- Nausea
- Food cravings/aversions
- Acne
- Salivation (metallic taste in the mouth may occur)
- Constant need to pee
- Intense emotions
What's Happening With Your Baby
- Baby is approximately .51 inch (size of a blueberry)
- 100 brain cells are produced every minute
- Heart becomes more sophisticated
- Permanent kidneys are developed
- Arm and leg joints start to form
8th Week of Pregnancy
- Sore breasts (bigger and heavier)
- Fatigue and nausea
- Pregnancy cramps
- Tummy problems: constipation, bloating, heartburn, indegestion
- Heightened sense of smell
- Vivid dreams
What's Happening With Your Baby
- Baby is approximately .63 inch/.04 ounce (size of a raspberry)
- Grows a millimeter daily
- Arms and leg movements start
- Tail is gone; fingers and toes separate
- Baby's taste buds form
9th Week of Pregnancy
- Mood swings
- Morning or all day sickness/fatigue
- Frequent need on pee
- Nasal congestion
- Weight gain
What's Happening With Your Baby
- Baby is approximately .9 inch/.07 ounce (size of a raspberry)
- Facial features are more distinct
- Heartbeat strong enough to be detected fetal doppler
(NOTE: Trying to balance your pregnancy, life, and getting ready for baby? Use my checklist pack stay healthy (naturally), organized, and confident throughout your pregnancy! Get them here.)
10th Week of Pregnancy
- Abdominal pains
- Nausea/Fatigue
- Intense emotions/vivid dreams
- Sore breasts
- Visible veins
What's Happening With Your Baby
- Baby is approximately 1.2 inches/.14 ounce (size of a prune)
- Arm joints now work
- Bones and cartilage form
- Vital organs are fully-functioning
- Hair and fingernails start to appear
- Baby now kicks and swallows
11th Week of Pregnancy
- Increased vaginal discharge
- Appearance of the linea nigra
- Nausea/fatigue
- Mood swings
- Leg cramps
What's Happening With Your Baby
- Baby is approximately 1.6 inches/.25 ounce (size of a lime)
- 1:1 head to body ratio
- Pronounced movements
- Still has see-through skin
- Tooth buds, hair follicles, and nails start to form
- Fingers and toes are no longer webbed
12th Week of Pregnancy
- Less nausea and fatigue
- More vaginal discharge
- Noticeably bigger tummy
- Headaches/dizziness
- Vision changes
- Drops in blood sugar
- Dehydration
- Stress
What's Happening With Your Baby
- Baby's approximately 2.1 inches/.49 hounces (size of a plum)
- Most of vital systems of have fully formed
- Reflexes start to develop
- Toes and fingers move voluntarily
- Fast brain development
13th Week of Pregnancy
- Visible veins
- Less fatigue/nausea
- Increased sex drive
What's Happening With Your Baby
- Baby is now about 2.9 inches/.81 ounce (the size of a peach)
- Head is now 1/3 the size of the body
- Teeth and vocal cords start to form
- Already has fingerprints
- Intestines move from near the umbilical cord to the tummy
The 2nd Trimester
You're likely starting to feel better - nausea and fatigue begin to fade around this point and you may want a wider variety of food. Pregnancy hormones often have your hair and skin looking great. Best of all, you get a cute baby bump - and start to feel baby movements!
14th Week of Pregnancy
- Increased appetite
- Thicker and shinier hair
- Minor aches and pains
What's Happening With Your Baby
- Baby's about 3.4 inches/1.5 ounces (size of a lemon)
- Knows how to wiggle toes and suck thumb
- Kindeys, liver, and spleen are fully functional
- A thin layer of hair known as lanugo appears to keep the baby warm
15th Week of Pregnancy
- Nosebleeds
- Heartburn/gas/indigestion
- Swollen gums
- Increased libido
What's Happening With Your Baby
- Baby is around 4 inches/2.5 ounces (size of a navel orange)
- Regularly squirms
- Can now hiccup
- All joints and limbs are now mobile
16th Week of Pregnancy
- Back aches
- Constipation
- Forgetfulness
- Faster hair/nail growth
- Dry/itchy eyes
- Glowing skin
What's Happening With Your Baby
- Baby is around 4.6 inches/3.5 ounces (size of an avocado)
- Pronounced heartbeat
- Auditory system now functioning
- Hair, lashes, eyebrows start to grow
- Taste buds develop faster
17th Week of Pregnancy
- Bodily fluids in full force: vaginal discharge, sweat, and mucus
- Weird dreams
- Itchy breasts and tummy
- Rapid weight gain
What's Happening With Your Baby
- Baby is approximately 5.1in/5.9oz (size of an onion)
- Cartilage turns to bone
- Fat develops
- Umbilical cord becomes thicker/stronger
18th Week of Pregnancy
- Swollen hands/feet
- Dehydration
- Varicose veins
- Sleeping problems
- Nosebleeds
What's Happening With Your Baby
- Baby is approximately 5.6in/6.7oz (size of sweet potato)
- Yawns, hiccups, sucks, and swallows
- More noticeable movements such as kicking
19th Week of Pregnancy
- Abdominal aches
- Dizziness
- Leg cramps/hip pain
What's Happening With Your Baby
- Baby is about 6 inches/8.5 ounces (size of a mango)
- Venix caseosa, a thick, white protective cream coating, is formed over baby's skin
- Nerve cells for the 5 senses start to develop
20th Week of Pregnancy
- Vaginal discharge
- Leg cramps
- Heartburn
- Swollen feet/hands
- Shortness of breath
- Increased energy and/or libido
What's Happening With Your Baby
- Baby's about 6.5 inches/10.2 ounces (size of a banana)
- Taste buds are fully functional
- Consumes increased ounces of amniotic fluid daily
21st Week of Pregnancy
- Heartburn/indigestion
- Braxton-Hicks contractions
- Leaky milk ducts
- Dry/itchy skin
- Stretch marks
What's Happening With Your Baby
- Baby's about 10.5 inches/12.7 ounces (size of a pomegranate)
- Digestive system prepares for the outside world by producing meconium - a tarry black substance found in baby's first poop
- If baby is a girl, she already had at least 6 million eggs in her womb
22nd Week of Pregnancy
- Increased libido
- Stretch Marks
- More vaginal discharge
- Steady weight gain
- Minor hands/feet swelling
- Back aches
- Shortness of breath
- Hair growth
What's Happening With Your Baby
- Baby's about 11 inches/16 ounces (size of a papaya)
- More distinct eyes and lips
- Sleeps 12-14 hours a day, in cycles
23rd Week of Pregnancy
- Swollen ankles/feet
- Braxton-Hicks contractions
- Back aches
- Swollen/bleeding gums
What's Happening With Your Baby
- Baby's about 11 inches/16 ounces (size of a grapefuit)
- Small nipples are formed
- Face is fully-formed
- Listens to sounds from outside the womb
24th Week of Pregnancy
- Swollen ankles/feet
- Leg cramps/backaches
- Linea nigra/stretch marks
What's Happening With Your Baby
- Baby's about 11 inches/16 ounces (size of a cantaloupe)
- Skin becomes more opaque
- Skin gets a new pink glow due to recently formed capillaries
25th Week of Pregnancy
- Heartburn/constipation
- Bloating/gas
- Hemorrhoids
- Aches and pains all over
- Sleeping problems
What's Happening With Your Baby
- Baby's about 14 inches/2 pounds (size of a cauliflower)
- Has a sense of equilibrium (balance)
- Chubbier with more hair!
26th Week of Pregnancy
- Forgetfulness ("pregnancy brain")
- Sleeping troubles
- Swelling
- Headaches/slight increase in blood pressure
- Braxon Hicks contractions
What's Happening With Your Baby
- Baby's about 14 inches/2 pounds (size of a head of lettuce)
- Soaks up mom's antibodies to prepare the immune system for the outside world
- Taking breaths of amniotic fluid
27th Week of Pregnancy
- Leg cramps/backaches
- Constipation
- Hemorrhoids
- Changes in skin, hair, and nail (either thicker, more brittle, or grows too fast)
- Leaking a little urine with sneezing
What's Happening With Your Baby
- Baby's about 14 inches/2 pounds (size of a rutabaga)
- Lungs develop rapidly/breathing is exercised regularly
- Increased brain activity
The 3rd Trimester
Your baby is really growing at this point. At the beginning of this trimester you probably still feel plenty of energy, though you find your thoughts beginning to turn to birth - now is a great time to start childbirth classes (check out my online MamaBaby Birthing childbirth class)!
By the end of this trimester, your baby is full-term and you're likely slowing down quite a bit, though a daily walk will do wonders. Take it easy, pamper yourself, and enjoy making last-minute baby preparations!
The 3rd Trimester
28th Week of Pregnancy
- Sleeping problems
- Shortness of breath
- Aches and pains
- Braxton-hicks contractions
- Leaky breasts
What's Happening With Your Baby
- Baby's about 14 inches/2 pounds (size of an eggplant)
- Chubbier with reduced wrinkles
- Lungs are fully-matured
29th Week of Pregnancy
- Headaches
- Back, leg, pelvic pain
- Hemorrhoids
- Constipation
- Frequent need to pee
- Sleeping problems
What's Happening With Your Baby
- Baby's about 16 inches/3 pounds (size of an acorn squash)
- White fat deposits under the skin are growing
- Distinct movements
30th Week of Pregnancy
- Heartburn
- Trouble sleeping/weird dreams
- General discomfort
- Shortness of breath
- Swelling
What's Happening With Your Baby
- Baby's about 16 inches/3 pounds (size of an acorn squash)
- White fat deposits under the skin are growing
- Distinct movements
31st Week of Pregnancy
- Shortness of breath
- Anxiety
- Frequent urge to pee
- Leaky breasts
- Dry/brittle nails
- Aches/pains
- Heartburn
- Braxton-Hicks contractions
- Sleeping problems
What's Happening With Your Baby
- Baby's about 16 inches/3 pounds (size of a pineapple)
- Major brain/nerve developments occur
- All five senses are working
32nd Week of Pregnancy
- Braxton-Hicks contractions
- Darker nipples
- Enlarged/leaky breasts
- Shortness of breath
- Heartburn
- Vaginal discharge
What's Happening With Your Baby
- Baby's about 16 inches/3 pounds (size of a squash)
- More likely in the head-down position by now
33rd Week of Pregnancy
- Heightened metabolic rate/feeling literally hot
- Headaches
- Shortness of breath
- Stress
- Dehydration
- Pregnancy brain/"placenta brain" - forgetfulness/clumsiness
What's Happening With Your Baby
- Baby's about 18 inches/5 pounds (size of a durian)
- Keeps eyes open while awake
- Bones are becoming harder
- Starts to coordinate breathing with swallowing and sucking
- Major brain developments occur
34th Week of Pregnancy
- Blurry vision
- Fatigue
- Constipation
- Hemorrhoids
- Swollen feet/ankles
- Frequent peeing
- Pressure down the pelvic area
What's Happening With Your Baby
- Baby's about 18 inches/5 pounds (size of a butternet squash)
- Urinates about a pint/day
35th Week of Pregnancy
- Frequent urination
- Constipation
- Increased contractions
- Aches and pains
What's Happening With Your Baby
- Baby's about 18 inches/5 pounds (size of a coconut)
- Hearing is fully developed
- If he's a boy, testes are now noticeable
36th Week of Pregnancy
- Decreased breathing problems
- Pelvic discomfort
- Difficulty sleeping
- Heartburn
- Ankle/foot swelling
What's Happening With Your Baby
- Baby's about 18 inches/5 pounds (size of a honeydew)
- Getting closer to learning to breath on his/her own
- Skin becomes smoother/gums more rigid
- Liver and kidneys are fully-functional
- Circulation and immune systems are good to go
37th Week of Pregnancy
- "Nesting" symptoms
- Heartburn
- Spotting
- Stretch marks
- Greater urge to pee
- Trouble sleeping
What's Happening With Your Baby
- Baby's about 19.5 inches/7.5 pounds (size of a winter melon)
- Gains about 1/2 ounce daily
- Skills like inhaling, exhaling, sucking, and gripping, and blinking become more accurate
- Gets first sticky poo (meconium)
38th Week of Pregnancy
- Shooting sensations inside the pelvis/vagina
- Braxton-Hicks contractions
- Vaginal discharge
- Difficulty Sleeping
- Itchy Tummy
- Swollen feet/ankles
- Slightly bloody mucus discharge/diarrhea (signs of impending labor)
What's Happening With Your Baby
- Baby's about 19.5 inches/7.5 pounds (size of a pumpkin)
- Head is now about the same circumference as the abdomen
- About an inche of hair has appeared
- Starts shedding vernix caseosa
39th Week of Pregnancy
- False labor
- Heartburn
- Hemorrhoids
- Pelvic pressure
- Shortness of breath
- Leaking of amniotic fluid/water breaking
What's Happening With Your Baby
- Baby's about 19.5 inches/7.5 pounds (size of a watermelon)
- Able to flex limbs by now
- Rapid developments in the brain
- Nails may extend past fingertips
40th Week of Pregnancy
- Anxiety
- Continuation of last week's symptoms
What's Happening With Your Baby
- Baby's about 19.5 inches/7.5 pounds (size of a jackfruit)
- Continues to grow hairs and nails
- Continues to develop his/her lungs
41st Week of Pregnancy
Remember, your "due date" is just an estimate - many mamas go past 40 weeks, especially first-time mamas. I went 10 days past with my 1st baby...
...and 6 days past with my 8th!
- Plenty of contractions!
- Continuation of last week's symptoms
What's Happening With Your Baby
- Baby becomes bigger due to extra time in the womb
- Grows even longer hair and nails
42nd Week of Pregnancy
- Continuation of last week's symptoms with more intensity
What's Happening With Your Baby
- Has probably shed the vernix caseosa entirely; skin becomes a little dry
The Full Week by Week Pregnancy Chart!
See the full chart below!
