Pregnancy week tracker
Enter the first day of your last period and see exactly where you are, plus what is happening this week. Step forward and back to look ahead.
Size
not yet conceived
Length
—
Weight
— g
Baby this week
Week 1 of pregnancy is calculated from the first day of your last menstrual period. You are not actually pregnant yet — your body is preparing for ovulation.
What you may notice
Period begins. Hormones reset for the new cycle.
Tips for this week
- Start prenatal vitamins with folic acid if you're trying to conceive
- Track the first day of your period — this is your reference point
- Cut alcohol and limit caffeine
Size
still preparing
Length
—
Weight
— g
Baby this week
Ovulation typically occurs around week 2. An egg is released and ready for fertilization.
What you may notice
Cervical mucus thins and stretches — a fertility sign. Slight rise in basal body temperature after ovulation.
Tips for this week
- Track ovulation if trying to conceive
- Continue folic acid
- Have intercourse around ovulation for the best chance
Size
pinhead
Length
0.1 mm
Weight
< 0.001 g
Baby this week
Fertilization occurs. The single-cell zygote begins dividing as it travels down the fallopian tube. By end of week, a tiny ball of cells (blastocyst) implants in the uterine wall.
What you may notice
You likely won't notice anything yet. Some women notice very mild implantation spotting.
Tips for this week
- Take folic acid daily (400–800 mcg)
- Avoid alcohol, smoking, and unnecessary medications
- Test in about 2 weeks
Size
poppy seed
Length
0.5 mm
Weight
< 0.001 g
Baby this week
The embryo is implanted. The amniotic sac and yolk sac form. The placenta begins to develop.
What you may notice
Possible missed period. Some early symptoms: tender breasts, light cramping, fatigue. Home pregnancy test can detect hCG now.
Tips for this week
- Take a home pregnancy test
- Schedule your first prenatal appointment
- Avoid raw fish, soft cheeses, and deli meats
Size
sesame seed
Length
2 mm
Weight
< 0.001 g
Baby this week
The neural tube (brain and spinal cord) starts forming. The heart begins as a tiny tube and starts beating.
What you may notice
Morning sickness may begin. Frequent urination. Heightened sense of smell.
Tips for this week
- Eat small frequent meals to manage nausea
- Stay hydrated
- Get plenty of sleep
Size
lentil
Length
4 mm
Weight
< 0.01 g
Baby this week
Tiny limb buds appear. Facial features start forming. The heartbeat may be visible on ultrasound.
What you may notice
Nausea often peaks around now. Mood swings, breast tenderness.
Tips for this week
- Ginger tea and crackers can help with nausea
- Continue prenatal vitamins
- Avoid hot tubs and saunas
Size
blueberry
Length
10 mm
Weight
< 0.1 g
Baby this week
Brain develops rapidly — 100 new cells per minute. Hands and feet start to form.
What you may notice
Fatigue is common. You may notice food aversions or strong cravings.
Tips for this week
- Listen to your body — rest when you need to
- Avoid strong smells if they trigger nausea
- Drink plenty of water
Size
kidney bean
Length
16 mm
Weight
1 g
Baby this week
All major organs have begun forming. Tiny fingers and toes are visible. The embryo is now called a fetus.
What you may notice
Uterus is the size of a grapefruit. Veins more visible. Continued fatigue.
Tips for this week
- First prenatal visit usually around now
- Discuss any medications with your provider
- Begin gentle exercise like walking
Size
grape
Length
23 mm
Weight
2 g
Baby this week
The fetus can move tiny limbs. Tooth buds form. External genitalia are starting to differentiate.
What you may notice
Slight weight gain. Breast size may increase. Possible heartburn.
Tips for this week
- Wear a supportive bra
- Eat slowly to reduce heartburn
- Avoid lying down right after meals
Size
kumquat
Length
31 mm
Weight
4 g
Baby this week
Vital organs are functional. Fingernails begin forming. The fetus can swallow amniotic fluid.
What you may notice
Possible visible "bump" in second-time moms. Hair may grow faster.
Tips for this week
- Schedule your NT scan (typically 11–14 weeks)
- Eat fiber-rich foods to combat constipation
- Stay active
Size
fig
Length
41 mm
Weight
7 g
Baby this week
Fingers and toes are no longer webbed. The fetus can hiccup. External genitalia continues to develop.
What you may notice
Energy may start returning. Nausea may begin to ease for some.
Tips for this week
- First-trimester screening can be done now
- Drink at least 8 cups of water daily
- Continue prenatal vitamins
Size
lime
Length
54 mm
Weight
14 g
Baby this week
Reflexes develop. The fetus can open and close fists. Vocal cords are forming.
What you may notice
Risk of miscarriage drops significantly. Belly may start showing.
Tips for this week
- Consider sharing the news after this week
- Start sleeping on your side
- Get a maternity bra fitting
Size
lemon
Length
74 mm
Weight
23 g
Baby this week
Vocal cords are formed. Intestines move into the abdomen. The fetus has unique fingerprints.
What you may notice
End of first trimester. Energy improves for many. Nausea subsides.
Tips for this week
- Celebrate making it through the first trimester
- Begin gentle prenatal yoga
- Eat protein-rich foods
Size
peach
Length
87 mm
Weight
43 g
Baby this week
Facial muscles develop. The fetus can squint, frown, and grimace. Lanugo (fine hair) starts to grow.
What you may notice
"Honeymoon" trimester begins. Energy returns. Skin may glow.
Tips for this week
- Start kegel exercises
- Plan a babymoon if you can
- Set up your prenatal appointment schedule
Size
apple
Length
10 cm
Weight
70 g
Baby this week
Bones harden. The fetus can sense light through closed eyelids. Taste buds form.
What you may notice
Visible bump for most. Possible nasal congestion ("pregnancy rhinitis").
Tips for this week
- Use a humidifier for congestion
- Sleep on your left side for better circulation
- Drink lots of water
Size
avocado
Length
12 cm
Weight
100 g
Baby this week
Limbs are well-formed. The fetus can hear muffled sounds. Eyes can move.
What you may notice
You may feel first flutters ("quickening") if it's your second pregnancy.
Tips for this week
- Talk and sing to your baby — they can hear you
- Begin sleeping with a pregnancy pillow
- Eat iron-rich foods
Size
pomegranate
Length
13 cm
Weight
140 g
Baby this week
Fat begins to accumulate. The fetus can move all joints.
What you may notice
Round ligament pain may begin. Breasts continue to grow.
Tips for this week
- Move slowly when changing positions
- Wear supportive shoes
- Avoid lifting heavy objects
Size
bell pepper
Length
14 cm
Weight
190 g
Baby this week
Yawning and hiccupping happen. Ears stand out from the head.
What you may notice
Anatomy scan typically scheduled this week or next. Bigger appetite.
Tips for this week
- Schedule your anatomy ultrasound
- Take photos of your bump
- Make a birth plan draft
Size
mango
Length
15 cm
Weight
240 g
Baby this week
Vernix caseosa (waxy coating) develops to protect skin. Sensory development accelerates.
What you may notice
You may feel definite movement. Possible leg cramps at night.
Tips for this week
- Stretch calves before bed to ease cramps
- Eat bananas for potassium
- Stay well-hydrated
Size
banana
Length
16 cm
Weight
300 g
Baby this week
Halfway point. Anatomy scan reveals organs and possibly sex.
What you may notice
Belly button may pop out. Linea nigra may appear.
Tips for this week
- Anatomy scan typically scheduled this week
- Start thinking about baby names
- Begin nursery planning
Size
carrot
Length
27 cm
Weight
360 g
Baby this week
Movements become stronger. Eyebrows and eyelids fully formed.
What you may notice
Possible Braxton Hicks (practice contractions). Stretch marks may appear.
Tips for this week
- Moisturize your belly daily
- Wear comfortable clothing
- Time any contractions to know if they're real
Size
spaghetti squash
Length
28 cm
Weight
430 g
Baby this week
Hair on head visible. Lips, eyelids, and eyebrows are distinct.
What you may notice
Breasts may begin producing colostrum. Increased blood volume.
Tips for this week
- Use absorbent breast pads if leaking
- Eat plenty of leafy greens
- Schedule a prenatal massage
Size
large mango
Length
29 cm
Weight
500 g
Baby this week
Lungs continue developing surfactant. Pancreas begins making hormones.
What you may notice
Swelling in feet/ankles may start. Possible snoring.
Tips for this week
- Elevate feet when resting
- Avoid standing for long periods
- Use a body pillow at night
Size
corn cob
Length
30 cm
Weight
600 g
Baby this week
Viability milestone — with NICU support, baby has a chance of surviving outside the womb. Inner ear is fully formed.
What you may notice
Glucose tolerance test scheduled around now. Fundal height = weeks of pregnancy.
Tips for this week
- Schedule glucose screening
- Reduce sugary foods before the test
- Discuss pediatricians
Size
rutabaga
Length
34 cm
Weight
660 g
Baby this week
Reflexes are developing. Skin still translucent but filling out.
What you may notice
Possible sciatic nerve pain. Hair may seem thicker.
Tips for this week
- Try a body pillow between knees
- Gentle stretching helps sciatica
- Avoid heavy lifting
Size
scallion bunch
Length
36 cm
Weight
760 g
Baby this week
Eyes open for the first time. Strong response to sounds.
What you may notice
Higher blood pressure may be screened. Belly is noticeably larger.
Tips for this week
- Monitor for headaches/blurred vision (preeclampsia signs)
- Read or play music to baby
- Drink water consistently
Size
cauliflower
Length
37 cm
Weight
870 g
Baby this week
Brain activity becomes more complex. Lungs continue maturing.
What you may notice
End of second trimester. Possible third-trimester symptoms creeping in.
Tips for this week
- Begin a hospital bag checklist
- Tour the birthing center
- Decide on a birth plan
Size
eggplant
Length
37 cm
Weight
1000 g
Baby this week
Eyes can blink. REM sleep cycles begin. Lungs developing surfactant rapidly.
What you may notice
Visits become every 2 weeks. Rh-negative moms may get RhoGAM injection.
Tips for this week
- Start kick counts daily
- Schedule RhoGAM if Rh-negative
- Begin childbirth education classes
Size
butternut squash
Length
38 cm
Weight
1150 g
Baby this week
Bones are fully formed but soft. Energy stores building.
What you may notice
Heartburn, varicose veins, hemorrhoids more common.
Tips for this week
- Eat smaller meals to ease heartburn
- Sleep slightly elevated
- Wear compression socks
Size
cabbage
Length
40 cm
Weight
1320 g
Baby this week
Brain wrinkles form. Bone marrow takes over red blood cell production.
What you may notice
Tired, swollen, possibly irritable. Vivid dreams common.
Tips for this week
- Nap when possible
- Practice breathing exercises
- Pre-register at the hospital
Size
coconut
Length
41 cm
Weight
1500 g
Baby this week
Five senses are working. Movements may be more visible from outside.
What you may notice
Braxton Hicks more frequent. Possible leaky breasts.
Tips for this week
- Time Braxton Hicks to distinguish from real labor
- Pack hospital bag
- Take prenatal photos
Size
jicama
Length
42 cm
Weight
1700 g
Baby this week
Practicing breathing motions. Most are now head-down.
What you may notice
Increasing pelvic pressure. Shortness of breath common.
Tips for this week
- Practice good posture
- Sleep with extra pillows
- Learn breastfeeding basics
Size
pineapple
Length
43 cm
Weight
1920 g
Baby this week
Immune system developing. Skull bones still soft for delivery.
What you may notice
Difficulty sleeping. Frequent bathroom trips return.
Tips for this week
- Sleep on left side for circulation
- Limit fluids before bed
- Take warm baths
Size
cantaloupe
Length
44 cm
Weight
2150 g
Baby this week
Lungs nearly mature. Fingernails reach fingertips.
What you may notice
Visits become weekly. Group B Strep test around now.
Tips for this week
- Get GBS screening
- Install car seat
- Wash baby clothes in gentle detergent
Size
honeydew melon
Length
45 cm
Weight
2380 g
Baby this week
Kidneys fully developed. Liver processing waste.
What you may notice
Pelvic pressure increases. Possible "lightening" as baby drops.
Tips for this week
- Practice perineal massage
- Rest often
- Keep important phone numbers handy
Size
romaine lettuce head
Length
47 cm
Weight
2620 g
Baby this week
Considered "early term" if born now. Most organs fully developed.
What you may notice
Cervix may begin to dilate/efface. Increased mucus discharge.
Tips for this week
- Confirm hospital route and parking
- Have a backup driver
- Stock the freezer with meals
Size
swiss chard bunch
Length
48 cm
Weight
2860 g
Baby this week
"Early term." Practicing breathing, sucking, blinking. Gaining ~1 oz/day.
What you may notice
Strong Braxton Hicks. Possible loss of mucus plug.
Tips for this week
- Time contractions if regular
- Walk to encourage labor
- Charge phone and camera
Size
leek
Length
49 cm
Weight
3080 g
Baby this week
"Full term" approaches. Vernix mostly shed. Brain still developing.
What you may notice
Possible "bloody show." More frequent contractions.
Tips for this week
- Recognize labor signs
- Stay close to home
- Rest as much as possible
Size
mini watermelon
Length
50 cm
Weight
3290 g
Baby this week
"Full term" — ideal time for delivery. Last weight gains.
What you may notice
Body in active labor preparation. Energy or "nesting" surge possible.
Tips for this week
- Don't over-exert with nesting
- Light meals if labor approaches
- Try to nap
Size
small pumpkin
Length
51 cm
Weight
3460 g
Baby this week
Officially due. Most babies arrive within 2 weeks of due date — only ~5% on the exact day.
What you may notice
Everything from "nothing yet" to active labor. Both are normal.
Tips for this week
- Stay in close touch with your provider
- Watch for water breaking
- Trust your body — it knows what to do