Week 10: Fingers Fully Developed

Your baby now has ten fully developed fingers and ten toes! The webbing between the fingers is completely gone, and the tiny nails are starting to grow. The brain is developing at a fantastic rate, producing around 250,000 new nerve cells every minute.

The fetus is now in a phase of rapid growth. It is about 3 cm long — roughly the size of a kumquat — and all the vital organs are in place and have started to function. The kidneys produce urine, the liver makes red blood cells, and the stomach produces digestive juices. A tiny body in full operation!

This week is also significant for you. NIPT (Non-Invasive Prenatal Testing) can be offered from week 10, and the first ultrasound is approaching. Talk to your midwife or doctor if you would like more information about prenatal screening.

Baby's Development

Fingers and toes fully separated: All ten fingers and toes are now completely distinct with individual fingertips. The nails have started to grow
Skeleton forming: Cartilage is gradually becoming bone. This process is called ossification and continues until the child is in their late teens
Brain in overdrive: The brain produces around 250,000 new neurons every minute. This incredible growth lays the foundation for the entire nervous system
Vital organs working: The kidneys produce urine, the liver makes red blood cells, and the stomach produces digestive juices
Head dominates: The head makes up almost half the body length. The forehead is large because the brain is growing so fast
Face more developed: The eyelids are formed and cover the eyes. The ears have reached their final position on the head
Swallowing reflex starts: The baby can now swallow small amounts of amniotic fluid, stimulating the development of the digestive system
Size: The fetus is about 3–3.5 cm long (crown to rump) and weighs approximately 4 grams

Ossification of the Skeleton

In week 10, a fascinating process begins: cartilage that has functioned as a temporary skeleton starts to be replaced by real bone tissue. This process is called ossification and begins in the long bones of the arms and legs. Calcium and phosphorus are deposited into the cartilage, gradually hardening it.

This process is why your calcium needs increase during pregnancy. According to WHO, pregnant people need approximately 1,000 mg of calcium daily. Your body always prioritizes the baby, so if you do not get enough calcium through your diet, it will be taken from your own bones. Make sure to have plenty of dairy products, green vegetables, or supplements if needed.

The Brain's Incredible Growth Rate

The brain is the most active organ in the baby's body right now. With 250,000 new neurons per minute, the foundation is being laid for all future cognitive functions.

The brain has already formed its three main parts:

Forebrain: Foundation for thinking, memory, and emotions
Midbrain: Controls vision and motor function
Hindbrain: Controls balance, breathing, and heart rhythm

Now the first nerve pathways are beginning to connect. This is the start of a network that will eventually contain over 100 billion nerve cells.

Your Body

Round ligament pain: You may feel sharp or pulling pains in the groin as the round ligaments stretch to make room for the growing uterus
Veins becoming more visible: Increased blood volume can make blood vessels more visible, especially on the breasts and abdomen. This is completely harmless
Weight gain starting: Most people have gained between 0.5 and 2 kg by now. Both more and less can be completely normal
Digestive issues: The hormone progesterone slows digestion. Constipation, bloating, and heartburn are common complaints
Appetite varies: Some days you can eat normally, other days nausea is back. Listen to your body
Heart palpitations: Increased blood volume can cause episodes of palpitations. Usually harmless, but mention it to your midwife
Dry skin: Some pregnant people experience drier skin than usual. Use a good, fragrance-free moisturizer

Your Uterus Is Growing

Your uterus is now approximately the size of a large orange. It is gradually moving upward from the pelvis, and in a few weeks it will be possible to feel it above the pubic bone. This growth can cause a pulling feeling in the lower abdomen.

Round ligament pain — short, sharp pains in the groin — is very common and is caused by the round ligaments that hold the uterus in place being stretched. They are harmless and go away on their own. Rest, warmth, and gentle stretching can provide relief.

Good to Know

Calcium is important for the baby's bones and teeth, which are now being built up. According to WHO, approximately 1,000 mg of calcium per day is recommended for pregnant people.

Good calcium sources:

Milk (approximately 300 mg per glass)
Yogurt (approximately 200 mg per serving)
Cheese (approximately 200–300 mg per 30 grams)
Broccoli and kale
Almonds and sesame seeds

If you do not eat enough dairy, talk to your midwife about supplementation.

It may be time to consider telling your employer about your pregnancy, especially if your job involves heavy lifting, chemicals, or significant stress. You have the right to workplace adjustments during pregnancy under employment law in most countries.

Remember that all bodies are different. Do not compare your bump with others. Some people show early, others not until well into the second trimester. Both are completely normal and say nothing about the baby's health or development.

For constipation, it can help to eat fiber-rich foods such as whole grains, fruit, and vegetables. Drink plenty of water and stay active. Prunes are an old and effective natural remedy.

NIPT — Non-Invasive Prenatal Testing

From week 10, you can take NIPT (Non-Invasive Prenatal Testing). This is a blood test that analyzes free fetal DNA in your blood.

What Is NIPT?

NIPT is a simple blood test from the mother's arm that can detect chromosomal abnormalities in the fetus with very high accuracy. The test analyzes fragments of the baby's DNA that circulate in the mother's blood.

What Does NIPT Test For?

Trisomy 21 (Down syndrome): Over 99 percent accuracy
Trisomy 18 (Edwards syndrome): Approximately 98 percent accuracy
Trisomy 13 (Patau syndrome): Approximately 99 percent accuracy

Who Can Take NIPT?

NIPT is widely available through many healthcare systems. Availability, coverage, and cost vary by country:

In some countries, NIPT is offered to all pregnant people free of charge
In others, it may be recommended based on age or other risk factors
Privately funded NIPT is available in many regions

Talk to your midwife or doctor about what options are available to you.

Important to Know About NIPT

NIPT is a screening test, not a diagnostic test. A positive result must be confirmed with invasive testing (amniocentesis or chorionic villus sampling)
The test does not give answers on all chromosomal abnormalities or congenital conditions
It is completely voluntary — you will receive thorough information and counseling before making a decision
Results are usually available within 1–2 weeks
The test carries no risk for the baby (it is only a blood test from the mother's arm)

Talk to your midwife or doctor if you would like more information.

Workplace Rights in Pregnancy

Week 10 is a common time to start thinking about your work situation. In most countries, pregnant employees have legal rights including:

Adaptation of work if the work may be harmful to mother or baby
Exemption from night work if necessary for health
Time off for prenatal appointments with full pay
Early maternity leave in exceptional circumstances

You decide when to tell your employer. Many wait until after week 12, but it may be wise to tell them earlier if your job involves risk factors such as:

Heavy lifting
Chemicals or toxins
Infection risk
Prolonged standing
Night shifts

For Your Partner

Attend prenatal appointments when you can. It creates a stronger sense of connection to the pregnancy
Help with heavier tasks at home, especially lifting and carrying
Ask how your partner is doing. Sometimes the most important thing you can do is just listen and be present
Read up on NIPT together and discuss whether you want prenatal screening
Plan something enjoyable together — a restaurant visit, a spa day, or a relaxed weekend away

Tips for Week 10

Eat calcium-rich food: Make sure you get enough dairy, dark leafy greens, or supplements in your diet
Move gently: Daily walks and light exercise are good for both body and mood
Plan for your first trimester scan: The first trimester screening (nuchal translucency + blood tests) is offered around weeks 11–14. Make sure you have an appointment scheduled
Eat fiber-rich food: Whole grains, fruit, and vegetables help against constipation, which is common now
Talk about NIPT: If you are considering prenatal screening, book a counseling appointment with your midwife
Keep up pelvic floor exercises: Regular exercises prepare the body for birth and prevent pelvic floor problems

When to Contact a Doctor

Contact your doctor or midwife if you experience:

Persistent, severe abdominal pain that does not resolve
Bleeding with clots or tissue
Fever or chills
Pain or burning when urinating
Dizziness that prevents you from standing upright
Severe vomiting lasting more than 24 hours

Never hesitate to contact your doctor or emergency services if you experience bleeding in pregnancy. The vast majority of cases of bleeding in the first trimester resolve well, but it is important to have an evaluation.

Did You Know?

The brain is now producing approximately 250,000 new nerve cells (neurons) every minute! This incredible growth rate makes the brain the most active organ in the baby's body.
Your baby now has fully developed fingers with tiny nails that are already starting to grow. Some babies are born with surprisingly long nails!
The skeleton is beginning to ossify — meaning cartilage is gradually being replaced by bone. This process continues right through to the end of the teenage years.
The head makes up almost half the baby's total length right now, because the brain is growing so incredibly fast. Proportions will even out further into pregnancy.
The baby can already swallow amniotic fluid and produce urine! The kidneys have started functioning, and urine is released back into the amniotic fluid.
The baby's face is now almost fully formed, with eyes, nose, mouth, and ears in the right places. The eyelids are closed and will not open until around week 26.

Frequently Asked Questions About Week 10

When is the first ultrasound?

First trimester screening ultrasound is usually offered between weeks 11 and 14. The baby's size (CRL measurement) is measured to confirm the due date, the number of babies is checked, and a nuchal translucency measurement is taken, which can give an indication of chromosomal abnormalities. Make sure you have an appointment — contact your midwife or doctor if not.

Is round ligament pain something to worry about?

Sharp or pulling pains in the groin are usually completely harmless round ligament pains that occur because the round ligaments stretch as the uterus grows. They can come on suddenly with movement or coughing. Rest and warmth can relieve them. Contact your doctor if the pains are severe, persistent, or accompanied by bleeding.

Should I start wearing maternity clothes?

There is no fixed rule — wear what is comfortable. Many notice that normal trousers start to feel tight around weeks 10–14 due to bloating and uterine growth. Elastic waistbands, belly bands (belt extenders for trousers), or soft trousers can make the transition easier. You do not necessarily need specific maternity clothes yet.

Is it normal to feel bloated even though my bump is not showing?

Yes, very common! Bloating in early pregnancy is caused by the hormone progesterone, which slows digestion. You may feel large and tight in your clothes, even though the uterus is still tucked inside the pelvis. Eat fiber-rich food, drink plenty of water, and stay active to reduce discomfort.

What is the difference between NIPT and first trimester screening (nuchal translucency)?

NIPT is a blood test that analyzes free fetal DNA and can be taken from week 10. First trimester screening (nuchal translucency or combined screening) is done between weeks 11 and 14, and combines an ultrasound measurement of the fluid at the back of the baby's neck with a blood test. NIPT has higher accuracy for trisomy 21, while first trimester screening can also identify other structural abnormalities visible on ultrasound. Both are screening tests and are voluntary. Talk to your midwife about what is right for you.

Is it safe to dye my hair during pregnancy?

Evidence suggests there is little to indicate that hair dyeing is harmful in pregnancy. Most hair colorists use products that contain very low amounts of chemicals. Many choose to wait until after the first trimester or use ammonia-free products to be on the safe side. Talk to your hairdresser about alternatives.

Can I fly in week 10?

Yes, air travel is safe in the first trimester for most pregnant people. Some tips:

Drink plenty of water to avoid dehydration
Get up and walk in the cabin regularly on longer flights
Wear compression stockings on flights over 4 hours
Have travel insurance that covers pregnancy
Bring snacks to help with nausea

Avoid travel to areas with risk of malaria, Zika virus, or other infectious diseases. Talk to your doctor if you are planning long journeys.

How much weight should I have gained by week 10?

In the first trimester, it is normal to gain between 0.5 and 2 kg. Some people lose weight due to nausea, and this is usually completely fine.

Recommended total weight gain throughout pregnancy depends on pre-pregnancy BMI:

BMI under 18.5: 12.5–18 kg
BMI 18.5–24.9: 11.5–16 kg
BMI 25–29.9: 7–11.5 kg
BMI over 30: 5–9 kg

Talk to your midwife about your individual recommendations.

Is heartburn normal as early as week 10?

Yes, heartburn can start as early as the first trimester. The hormone progesterone relaxes the muscle between the esophagus and stomach, allowing stomach acid to rise. This problem often gets worse as pregnancy progresses.

Tips for heartburn:

Eat small, frequent meals
Avoid spicy, fatty, or acidic foods
Do not lie down right after eating
Raise the head of your bed slightly
Talk to your pharmacist about antacids that are safe in pregnancy

Next week: The baby begins to move actively, and the first teeth form beneath the gums!