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First Trimester

7 Weeks Pregnant

Your baby is the size of a Blueberry 🫐

🫐
Written by
Ashok Kumar Poudel
Health & Wellness Writer
Medically reviewed by
Dr. Bina Basnet
MBBS, MD — Gynecologist & Obstetrician
Last reviewed
📏
Size
Blueberry
📐
Length
1 cm
⚖️
Weight
< 1g
🗓️
Trimester
First
⏱️
Week
7 of 40

🌱 Baby Development at Week 7

The brain is growing explosively, generating roughly 100 new neurons per minute, while hands and feet form with webbed fingers and toes. At about 1 centimeter, the embryo has doubled in size and the embryonic tail is shrinking away.

Brain grows rapidlyWebbed fingers forming100x cell multiplication daily

🤱 Common Symptoms

●Morning sickness continues
●Food aversions and cravings
●Bloating
●Excessive saliva
●Dizziness

🥗 Nutrition Tips

  • Iron-rich foods to prevent anemia
  • Calcium for bone development
  • Vitamin D supplements recommended

🏃‍♀️ Exercise Tips

  • Kegel exercises begin now
  • Walking 20-30 minutes daily
  • Avoid contact sports

🏥 Medical Tests & Appointments

First prenatal appointment (7-9 weeks)Blood type, Rh factor, CBC, rubella immunity, STI screening

🔬 Hormone Changes

Progesterone remains high, contributing to fatigue, bloating, and constipation. The corpus luteum still produces most pregnancy hormones, with the placenta gradually taking over.

📖 Week 7 Pregnancy — In-Depth Guide

Week 7 is a growth explosion: your embryo has doubled in size since last week and now measures about 1 centimeter — the size of a blueberry. The brain is the fastest-growing organ, generating an astonishing number of new neurons every minute. Hands and feet are forming at the ends of the limb buds, though the fingers and toes are still webbed.

The embryonic tail is shrinking away. You are likely feeling very pregnant by now, with nausea, fatigue, and food aversions in full swing — and your first full prenatal appointment is probably just around the corner.

👶Baby Development at Week 7

The brain is growing at a breathtaking pace — research estimates around 100 new neurons form every minute during this period. The forebrain is dividing into regions that will become the left and right hemispheres, laying the groundwork for thought, memory, and sensation.

Hands and feet are taking shape at the ends of the arms and legs, though the digits are still webbed like tiny paddles. Elbow and knee joints are forming, and the arms can now bend at the elbow.

The face continues refining: eyelids are forming, the ears are developing both inside and out, and the tip of the nose is visible. The embryonic tail — a reminder of early development — is shrinking and will soon disappear entirely.

Internally, the liver is producing red blood cells, the kidneys are in place, and the intestines are growing rapidly. The umbilical cord is now fully formed, with one vein delivering oxygen-rich blood and two arteries carrying waste away. Your blueberry-sized embryo is increasingly complex by the hour.

🩺Your Body: Common Symptoms at Week 7

▸ Persistent morning sickness

Nausea often continues at full strength through week 7. It typically peaks around weeks 8 to 9, then gradually eases for most women by weeks 12 to 14.

▸ Food aversions and cravings

You may be repelled by foods you normally love while craving odd combinations. Both are normal hormonal effects — follow your appetite within healthy bounds.

▸ Bloating

Progesterone slows digestion, trapping gas and making your abdomen feel distended. Your uterus is still behind your pubic bone, so any visible bump is bloating, not baby.

▸ Excess saliva

Some women produce noticeably more saliva, possibly linked to nausea. Chewing gum or sucking on mints can make it more manageable.

▸ Dizziness

Blood vessels dilate under progesterone while blood volume is still catching up, which can lower blood pressure. Rise slowly and eat regularly to prevent lightheadedness.

▸ Frequent urination

The growing uterus plus increased blood flow keep the bathroom trips coming, day and night.

▸ Acne breakouts

Surging hormones can trigger breakouts even if your skin is usually clear. Stick to gentle skincare — many acne medications are unsafe in pregnancy, so check with your doctor.

🏥Medical Tests & Checkups at Week 7

The first comprehensive prenatal appointment often happens between weeks 7 and 10. Expect a full workup: blood type and Rh factor, complete blood count, rubella immunity, hepatitis B, syphilis, and HIV screening, plus a urine test and blood pressure check.

Your provider will take a detailed medical history, discuss genetic screening options like NIPT, available from week 10, and may perform a dating ultrasound. Bring a list of medications, supplements, and any family history of genetic conditions or pregnancy complications.

🥗Nutrition & Movement Tips

▸ Prioritize iron

Your blood volume is starting to expand, raising iron needs. Lean meats, lentils, spinach, and fortified cereals help prevent anemia — pair with vitamin C for absorption.

▸ Get calcium and vitamin D

Your baby’s skeleton is beginning to mineralize. Dairy, fortified plant milks, and leafy greens supply calcium; safe sun exposure and supplements cover vitamin D.

Never let your stomach get empty

Nausea worsens on an empty stomach, so eat a little every couple of hours. Keep emergency snacks in your bag, car, and desk.

▸ Start Kegel exercises

Strengthening your pelvic floor now pays off during pregnancy, labor, and recovery. Squeeze as if stopping urine flow, hold five seconds, release — repeat ten times, several times daily.

▸ Walk daily

Twenty to thirty minutes of walking boosts energy, mood, and digestion. It is one of the safest and most beneficial exercises throughout pregnancy.

✅Week 7 Checklist

✓Attend your first prenatal appointment if scheduled
✓Bring your medication list and family medical history
✓Ask about genetic screening options, NIPT from week 10
✓Start daily Kegel exercises
✓Keep snacks everywhere to manage nausea

📌When to Call Your Doctor

Severe symptoms this week can signal problems that need treatment. Call your doctor if you experience:

✓Vomiting so severe you cannot keep fluids down — risk of dehydration
✓Vaginal bleeding heavier than spotting, especially with cramps
✓Severe abdominal pain or persistent one-sided pain
✓Fever over 100.4°F (38°C)
✓Burning, urgency, or cloudy urine — possible urinary tract infection
📅 Track Your Pregnancy:Due Date CalculatorSymptoms by WeekTrimester Guide← Week 6Week 8 →

Frequently Asked Questions

Common questions answered by our medical team

At 7 weeks, your baby is approximately the size of a Blueberry (🫐). The brain is growing explosively, generating roughly 100 new neurons per minute, while hands and feet form with webbed fingers and toes. At about 1 centimeter, the embryo has doubled in size and the embryonic tail is shrinking away.

← Week 6Calculate Your Due DateWeek 8 →

🔗 Related First Trimester Resources

Second Trimester
Weeks 14–27 guide
Trimesters Explained
Guide to all three trimesters
Early Signs of Pregnancy
Earliest pregnancy symptoms
Symptoms Week by Week
What to expect each week
Pregnancy Week by Week
Detailed weekly guide

All Pregnancy Weeks

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