Week 21 is often a calmer stretch, which makes it easier to plan a visit and your routine check-ups. Instead of booking several separate appointments, try to combine everything into one trip: a blood draw, a blood pressure check, and a talk with your doctor. It saves time and is less tiring, especially if you commute from further away.
What to do in week 21
- Book your appointment and check whether the blood draw can happen the same day.
- Ask which tests require fasting.
- Write down the names of the products you take and prepare your test results.
- Note your questions about work and a certificate, if you need one.
- Find out where and when you will collect your results.
How to plan a visit and a blood draw on the same day
Call the reception desk and ask whether your blood draw can happen on the same day as your appointment. Some tests require fasting, while others have no such requirement — settle this in advance so you don't have to repeat the draw. If the clinic mainly works mornings, book as early a slot as possible.
- Ask which tests require fasting and which have no such requirement.
- Find out whether results will be available the same day or only later.
- Note where and during which hours results can be collected.
- Check whether a referral is needed for the appointment.
What to bring to your appointment
The less you have to search your phone during the visit, the calmer the conversation. Keep your documents in a single folder, and write your list of medications on paper with their full names. It also helps to have your questions ready — about work, activity, and upcoming tests.
- Your pregnancy notes and an ID document.
- Your test results and the report from your last ultrasound.
- A list of the medications and supplements you take, with their names, so the doctor can verify them.
- Questions written in advance — about work, travel, activity, and tests.
- A notebook or phone for writing down recommendations.
Questions worth having ready
A good question is specific and about your own situation. Instead of a general "is everything okay," ask about what genuinely concerns you: your results, upcoming appointments, whether you can keep your current habits. Write down the answers while you are still in the office.
- Does any of my results need to be repeated, and when?
- Which tests are planned in the coming weeks?
- Can I continue my current physical activity?
- Do I need a note or certificate for work?
- Who should I call outside the clinic's opening hours?
The blood draw station — what to settle before you go
Tests ordered during pregnancy can be done in different places: at the blood draw station attached to your clinic, at a laboratory, or at a hospital, if that is how your provider works. Each has different opening hours and a different way of delivering results, so it is worth settling this ahead of time. Also ask whether the referral stays at the facility or comes back to you.
- Check the blood draw station's opening hours and which days accept walk-ins.
- Find out whether a referral is needed and what happens to it after the draw.
- Ask how and when you will receive your results, and who else will see them.
- Note the address and the route if the laboratory is somewhere other than the clinic.
How to prepare for a blood draw
Preparation depends on the specific test, so don't rely on general advice from the internet. Ask the facility whether you should fast and whether you can drink water. If you take medication regularly, don't change anything on your own — mention it to the person taking your blood and ask your doctor.
- Confirm with the facility how to prepare for the specific test.
- Bring a list of the medications and supplements you take, with their names.
- Don't stop taking any medication on your own — discuss it with your doctor.
- Wear clothing with a sleeve that rolls up easily.
- After the draw, stay in the waiting area for a moment if you have ever felt faint.
After the visit: what to write down so nothing gets lost
Agreements from a visit blur quickly once you return to daily life. Before you leave the office, write down the date, the key decisions, and the dates of upcoming tests. The note doesn't have to be long — a few points you can return to before the next visit is enough.
- Write down the date of the visit and your week of pregnancy.
- Note the agreements about tests and their timing.
- Add any questions that went unanswered.
- Take a photo of your note and add it to your records.
Tip
Ask for your recommendations on paper, or take a photo of the notes while still in the office — after the visit it is easy to mix up the details.
When to contact a doctor
- • If you feel unwell after a blood draw, tell the staff and stay at the facility for a while.
- • If you faint, have a severe headache, or notice vision changes, contact your doctor.
- • Bleeding or fluid leaking from the vagina is a reason to call right away instead of waiting for your appointment.
- • Painful contractions that repeat regularly require contacting your healthcare facility.
- • In a life-threatening situation, call 112.
When to call a doctor or midwife
- • Bleeding or fluid leaking from the vagina.
- • Severe headache, vision changes, or sudden swelling.
- • Painful contractions that repeat regularly.
- • Fever, chills, or increasing weakness.
In a life-threatening situation call 112 or go to the nearest maternity hospital admission room — do not wait for a follow-up appointment.
Week 21 in detail
Week 21: how your baby is growing — Carrot
At twenty-one weeks your baby is about the size of a carrot (around 267 mm). The intestines have begun producing meconium — the first stool you'll see after birth. Taste buds are already working, so your baby tastes the amniotic fluid, which changes depending on what you eat.
Development at week 21
- The intestines produce meconium.
- Taste buds are active.
- Your baby tastes whatever you eat.
Tip
Midwife's tip: what you eat flavors the amniotic fluid. A varied diet is your baby's first 'cooking lessons'.
Sources
- NHS — You and your baby at 21 weeks — www.nhs.uk/pregnancy/week-by-week/13-to-27-weeks/21-weeks-pregnant/
- Mayo Clinic — Pregnancy week by week — www.mayoclinic.org/healthy-lifestyle/pregnancy-week-by-week
Week 21: what's happening in your body
Week twenty-one is when varicose veins or evening leg swelling may appear. Your growing uterus presses on blood vessels, and hormones relax the vein walls. Luckily, you have simple, effective tools to manage it.
How to manage swelling
- Elevate your legs above heart level in the evening.
- Wear compression stockings if you stand for long periods.
- Drink about 2–2.5 liters of water a day.
Varicose veins in pregnancy
- More common if they run in the family.
- Compression stockings are the best prevention.
- Movement and avoiding long standing help.
When to contact a doctor
- • Sudden, one-sided leg swelling with pain requires urgent consultation (possible blood clot).
Tip
Midwife's tip: evening swelling is normal, but sudden swelling of one leg or of the face is a sign to contact your doctor quickly.
Sources
- NHS — Common pregnancy symptoms (swollen ankles) — www.nhs.uk/pregnancy/related-conditions/common-symptoms/
Week 21: Swallowing and digesting — what you can do today
Week twenty-one is the time to focus on hydration. Water supports your kidneys, helps with swelling, and maintains healthy amniotic fluid levels. Set a goal and keep it with the help of the app.
Your tasks for this week
- Drink about 2–2.5 liters of water a day.
- Use the hydration tracker in the app.
- Elevate your legs in the evening if you have swelling.
Simple ways to stay hydrated
- Keep a bottle within reach at all times.
- Add lemon or mint for flavor.
- Drink a glass of water before every meal.
Tip
Midwife's tip: the color of your urine is a simple gauge — pale yellow means you're well hydrated.
Sources
- NHS — Healthy eating and fluids in pregnancy — www.nhs.uk/pregnancy/keeping-well/have-a-healthy-diet/
Related guides
- Mid-Pregnancy (Anomaly) Ultrasound — What It Checks and How to Prepare
The mid-trimester anomaly scan is the most detailed imaging test of pregnancy. We explain what it evaluates, how to prepare, how to read the report, and what the pathway looks like in the Polish healthcare system.
Medical disclaimer
This article is educational in nature and does not replace advice from a doctor, midwife or other specialist. If in doubt, contact your attending physician.
This week is awaiting medical review: the page is not indexed and carries no ads until the content has been verified by a medically qualified person.
Sources
We base our content on these documents. Every medical claim in the guide is reflected in one of the publications below.
- NHS — "Your antenatal appointments" (visits and tests in pregnancy) — www.nhs.uk/pregnancy/your-pregnancy-care/your-antenatal-appointments/
- NHS — "Keeping well in pregnancy" (how to look after yourself during pregnancy) — www.nhs.uk/pregnancy/keeping-well/
- Ministry of Health — "Organizational standards of perinatal care" (regulation) — www.gov.pl/web/zdrowie/standard-organizacyjny-opieki-okoloporodowej
- WHO — "WHO recommendations on antenatal care for a positive pregnancy experience" — www.who.int/publications/i/item/9789241549912
- NHS — You and your baby at 21 weeks — www.nhs.uk/pregnancy/week-by-week/13-to-27-weeks/21-weeks-pregnant/
- Mayo Clinic — Pregnancy week by week — www.mayoclinic.org/healthy-lifestyle/pregnancy-week-by-week
- NHS — Common pregnancy symptoms (swollen ankles) — www.nhs.uk/pregnancy/related-conditions/common-symptoms/
- NHS — Healthy eating and fluids in pregnancy — www.nhs.uk/pregnancy/keeping-well/have-a-healthy-diet/