Baby is the size of a large zucchini
👶 Baby's development
The baby sees, hears, reacts to taste. Nearly fills all the space in the uterus. Kicks actively.
💛 How mom feels
Shortness of breath, heartburn, frequent bathroom trips — all together. Count kicks: 10 in 2 hours is normal.
📖 Tip of the week
The baby can see, hear, and respond to taste and smell through amniotic fluid. Antibodies from mom are being transferred. Shortness of breath is possible — the uterus is pressing on the diaphragm; staying more upright helps.
🔬 Detailed baby development
- The fetus's brain surface is developing complex folds and grooves, increasing surface area dramatically
- The fetus is gaining weight rapidly — about 200 grams per week from now on
- Lanugo (fine body hair) begins to disappear as the fat layer thickens
- The bone marrow has completely taken over red blood cell production
- The fetus is running out of room and movements may feel different — more rolling than kicking
- The fetus is about 39.9 cm long and weighs approximately 1,300 grams, roughly the size of a large cabbage
🤱 What mom may feel
- Difficulty breathing as the uterus pushes up against the diaphragm
- Frequent heartburn and indigestion persist
- General discomfort from the growing belly — difficulty bending over, tying shoes, etc.
- Increased fatigue and desire to nap during the day
- Mood changes and anxiety about impending delivery are common
🏥 Tests and check-ups
Regular biweekly prenatal visit with standard monitoring. Your provider will track fetal growth and position. If you are at higher risk for preterm labor, additional monitoring may be implemented such as non-stress tests (NST) or biophysical profiles.
💡 Tips for this week
- Start researching breastfeeding basics and consider a lactation consultant appointment
- Attend childbirth preparation classes if you haven't already
- Finalize baby name choices and prepare any necessary paperwork
- Take short walks and gentle exercise to maintain energy and mood
- Begin planning who will care for other children or pets during labor and hospital stay
❓ Frequently asked questions
What is a non-stress test?
A non-stress test (NST) monitors the baby's heart rate in response to its movements. Sensors are placed on your belly for 20-40 minutes. A reactive result (heart rate increases with movement) is reassuring. It is a common test in the third trimester for higher-risk pregnancies.
Why are the baby's movements different now?
As the baby grows, there is less room to move in the uterus. Somersaults and flips are replaced by rolls, stretches, and jabs. You should still feel regular movement — the pattern matters more than the type of movement.
Should I be worried about preterm labor?
Signs of preterm labor include regular contractions before 37 weeks, lower back pain that doesn't go away, pelvic pressure, vaginal bleeding, or fluid leaking. Contact your provider immediately if you experience any of these symptoms.
📝 Week 30 of pregnancy: preparing for birth
Your baby at 30 weeks is approximately 40 cm long and weighs around 1.5 kg — comparable in size to a large cabbage. The lungs are continuing to mature, and while not yet fully developed, they would be capable of functioning with medical support if your baby were born now. Lanugo, the fine downy hair that has covered your baby’s body for several weeks, is beginning to disappear as fat deposits accumulate under the skin. Your baby now spends periods of time in REM sleep, which is thought to support brain development, and you may notice distinct cycles of activity and rest.
By 30 weeks, the top of your uterus (the fundus) sits about 30 cm above your pubic bone — this measurement, taken by your midwife, is known as the symphysis-fundal height (SFH) and gives an indication of your baby’s growth. Heartburn may be particularly troublesome as the uterus pushes against your stomach; eating smaller, more frequent meals and avoiding lying down straight after eating can help. Varicose veins and haemorrhoids are common in the third trimester due to increased blood volume and pressure; compression stockings and a high-fibre diet may offer relief. You may also notice more frequent trips to the bathroom as the baby’s head presses on your bladder.
Routine appointments at 30 weeks will include blood pressure monitoring, urinalysis, and measurement of the SFH. If any measurements fall outside the expected range, your midwife will refer you for a growth scan — this is routine and does not necessarily indicate a problem. Now is a good time to finalise your birth plan, including your preferences for pain relief, positions for labour, and who you would like as your birth partner. Discuss any concerns about induction of labour with your midwife, particularly if you have a condition such as gestational diabetes or hypertension that may affect the timing of your birth.
Continue to monitor your baby’s movements every day — if you are ever unsure whether movements have reduced, do not hesitate to contact your maternity unit. The RCOG (Royal College of Obstetricians and Gynaecologists) advises that there is no set number of movements that is considered normal; what matters is that you know your baby’s usual pattern. Ensure your diet includes plenty of omega-3 fatty acids from oily fish (such as salmon or mackerel — up to two portions per week) or plant-based sources such as walnuts and flaxseed, as these support your baby’s brain development. Begin preparing your hospital bag in earnest — list essentials for yourself, your birth partner, and your baby.
⚠️ When to see a doctor
- Vaginal bleeding
- Sudden decrease in baby movements (fewer than 10 in 2 hours)
- Severe headache or seeing spots
- Swelling of face, hands, or sudden leg swelling
- Leaking or gushing of amniotic fluid
- Regular contractions before 37 weeks (every 10 minutes)
- Fever above 38°C (100.4°F)
Sources
- WHO recommendations on antenatal care (2016)
- ACOG Practice Bulletins
- Williams Obstetrics, 26th Edition
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