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First Trimester

7 Weeks Pregnant

Your baby is the size of a Blueberry 🫐

🫐
Ashok Kumar Poudel
Written by
Ashok Kumar Poudel
Health & Wellness Writer
Dr. Bina Basnet
Medically reviewed by
MBBS, MD — Gynecologist & Obstetrician
Last reviewed:
Feb 2026
📏
Size
Blueberry
📐
Length
1 cm
⚖️
Weight
< 1g
🗓️
Trimester
First
⏱️
Week
7 of 40

🌱 Baby Development at Week 7

The baby has doubled in size. The brain is growing rapidly — generating 100 new neurons per minute. Hands and feet are forming, though webbed. Eyelids and ears are starting to develop.

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 causes relaxation of smooth muscles — contributing to bloating and constipation.

📖 Week 7 Pregnancy — In-Depth Guide

You’re in week 7 of pregnancy, and probably loving every moment of it!

You’ve got several reasons to, most notably preparing for your first prenatal visit.

There’s a lot going through your mind at this stage such as how big is my baby in week 7, and the symptoms you can expect to experience.

Your baby’s size in your seventh week is about the size of a blueberry, where your embryo has almost doubled in size from your 6th week of pregnancy, and currently measures approximately 0.51 inches.

🩺7th Week Pregnancy Symptoms

At 7 weeks pregnant, you may experience a wide range of symptoms, some that won’t bother you much, while others that can make you feel uncomfortable all through the day.

Here are a few of the common symptoms in week 7.

Extra saliva

Extra saliva when being pregnant

This is one of those symptoms that you probably didn’t expect to be on this list, but its here because it is common to a few women.

While there are varying reports of what causes excess saliva or the need to spit, it is perfectly normal and as some medically experts believe is mostly triggered by hormones.

If you’re experiencing this, the best advice is to drink plenty of water to help stay hydrated rather than over-hydrated, and to also reduce the production of saliva. You can also try sucking on hard candies or chewing sugarless gum

Food aversions and nausea

Food aversions and nausea during pregnancy

This one’s a tricky one because you may find your favorite foods repulsive or have the urge to eat weird foods or not wanting to eat at all.

Regardless of the type of appetite, don’t despair because it’s perfectly normal, and it does start to subside after your first trimester.

Food aversions may be a great way to stay away from potentially dangerous foods, and are somewhat related to morning sickness.

Its okay to indulge in foods that you can’t resist albeit every so often, but also simultaneously identify foods and odors that may trigger these symptoms.

If your symptoms do get out of hand such as when you cannot keep foods or liquids in your body for more than 24 hours, seek professional help.

Nausea

Nausea while being pregnant

This is a common symptom that you’ve probably experienced since your first week, and will do so for several more weeks to come!

Some moms-to-be find great help in acupuncture wristbands, and others with Vitamin B-6 or ginger for their tummy issues. Remember that this is a stage where your hormones are working overtime, so nausea does tend to disappear as they are more relaxed.

Acne Acne while being pregnant

Cramping and/or spotting

Cramping while being pregnant

Again this is a symptom that you’re familiar with especially in your second week of pregnancy, and is caused mostly because of your busy uterus.

Furthermore, pregnancy may cause your cervix to become more sensitive especially after sex resulting in mild spotting.

These two symptoms can raise eyebrows for any mother-to-be, but in most cases is not a reason to panic. However, if you experience abdominal pain worse than menstrual cramps or heavy bleeding more than your period, get in touch with your OB for professional help.

If you don’t experience any of the aforementioned symptoms, you’re one of the lucky ones, and rest assured it is not a sign of any problem, given that, not all women are created equal so symptoms do vary.

Your hormones at 7 weeks pregnant

You will experience diverse hormonal changes all through your pregnancy, which will contribute to several of your pregnancy symptoms.

Your body begins to secrete the hormone, human chorionic gonadotrophin (hCG) following the implantation of the fertilized egg.

This hormone plays a vital role towards several elements of your pregnancy, most notably preventing premature labor and lactation, fetal development and strengthening the pelvic wall muscles to get your body ready for labor.

Apart from HCG, your placenta secretes a few other vital hormones including:

Corticotrophin-releasing hormone

This hormone helps determine the duration of your pregnancy, and also assists with your baby’s growth and development. It later on along with other hormones such as cortisol increases the mother-baby bond.

Human placental lactogen

This hormone aids with the growth of the mammary gland and plays a crucial role in increasing nutrients in your blood.

🤰Inside your Belly in Week 7 and ultrasound

Have you caught yourself looking into the mirror in the hopes of spotting one?

Sorry to break it to you, but 7 weeks is a bit too early to experience a protruding belly, unless of course you’re expecting twins.

With regards to ultrasound, you probably won’t have one when you’re 7 weeks pregnant. However, what you should be excited about is your upcoming prenatal visit, and what to expect from it.

At your first prenatal visit, you should be prepared to provide a variety of samples such as urine, blood and cervical cells for a pap smear.

You will also have your first ultrasound to confirm that your baby is as happy and well as can be, and get your estimated due date.

👶Your Baby's Development in Week 07

Week 7 is yet another significant week for your baby, where the embryo looks similar to a tadpole in the earlier part of the week, and transforms into a distinct, human-like being by the end of the week.

Your baby’s ongoing development in week 7 includes lengthening of the body, arms beginning to bend at the elbows and set themselves around the heart.

By the time week 7 comes to an end, the entire skeleton of the embryo that consists of a flexible cartilage will be fully formed.

Week 7 also sees the inception of your baby’s digestive system complete with kidneys, liver, heart, spleen and appendix.

Your placenta in week 7 will sort of look like a fuzzy ball due to the outburst of tiny hair-like projections aka villi, which ultimately will fulfill the important role of transporting nutrients and oxygen from your bloodstream to your rapidly developing baby.

Interesting Facts about your Baby in Week 7
Your baby’s heart is beating much faster than yours, somewhere around 160 beats per minute
It will slowly begin to move around in pregnancy week 7
Your baby’s skin is paper thin and almost transparent
It may begin thumb sucking around this time
Things to do in Week 7 of Pregnancy:
Learn about prenatal tests
Check which over the counter medicines are safe
Start taking belly photos
📅 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 baby has doubled in size. The brain is growing rapidly — generating 100 new neurons per minute. Hands and feet are forming, though webbed. Eyelids and ears are starting to develop.

← 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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