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Week 20 of pregnancy — what is happening and what to do

Mamiqa Editorial Team · updated September 12, 2026 · 6 min read

Content pending medical review. This material was prepared by the Mamiqa editorial team based on publicly available guidelines; it is not yet indexed by search engines and we show no ads on it until it has been reviewed by a medically qualified person.

Week twenty is the halfway point of pregnancy and a good moment to sort out the formalities. In Poland, some imaging tests during pregnancy are done as part of routine pregnancy care, and some under the prenatal screening program — depending on indications and the facility. It is worth knowing what the path from referral to appointment looks like, so you do not lose weeks working out the details.

What to do in week 20

  • Agree with your doctor which tests are planned and when.
  • Write down the referral number, the date it was issued and the appointment date.
  • Check with the facility how to prepare for the blood draw.
  • Ask about the prenatal screening program and the documents to prepare.
  • Take a photo of the referrals and save it in the app.

Referral and appointment — how it works in practice

Whether you need a referral is decided by the facility and the type of test. Most often the doctor managing your pregnancy refers you, and reception offers the nearest available slot. If it falls outside the recommended window, ask whether you can register at another imaging center or whether the clinic runs a waiting list.

  • Ask the doctor which test is done at a given stage and by when it is worth having it.
  • Check whether the facility accepts referrals from other clinics.
  • Write down the referral number and the date it was issued.
  • Ask whether the test is covered by care or requires an extra payment.

The prenatal screening program — what to ask at the clinic

The prenatal screening program is an arrangement in which some tests are available according to specific indications, for example based on the results of earlier tests or a conversation with your doctor. The details depend on the facility and on individual qualification, so questions about enrollment are best asked at the clinic managing your pregnancy.

  • Ask whether your facility runs the program and who refers patients to it.
  • Prepare your documents: pregnancy record, results and ID.
  • Write down your questions about qualification and dates so you can return to them at the appointment.

Appointments and blood tests without chaos

Some tests are done fasting and others have no such requirement — ask the facility how to prepare for a specific blood draw. If possible, book the blood draw and the appointment on the same day. Take your referrals with you and note where and when you will pick up the results.

Maternity leave and formalities — where to start

The halfway point of pregnancy is a good moment to gather information about leave and documents, instead of leaving it to the last weeks. The rules depend on your type of contract and employment situation, so look for concrete answers in HR or at the office paying the benefit. It is worth noting straight away which documents are needed and who issues them.

  • Ask HR which documents are needed and by when to submit them.
  • Establish who issues the certificate needed for the application.
  • Record the deadlines for submitting the paperwork so you do not put it off.
  • Ask for the information in writing, or for the contact details of the person handling your case.

The conversation with HR is often easier when you arrive with a ready list of questions. Write them down beforehand and ask for the arrangements to be confirmed, for example in a message. Then you do not have to rely on memory when you return to the topic a few weeks later.

Work versus appointments and tests during working hours

Check-ups and tests usually fall during working hours, so it is worth agreeing with your employer how to report and account for them. Some facilities issue a certificate of attendance at the appointment, which can be needed for your records. If possible, combine several matters into one day and give notice of your absence in advance.

  • Ask the facility whether you will receive a certificate of attendance.
  • Agree with your employer how to report absence for tests.
  • Try to combine appointments and blood draws into one trip.
  • Record the dates of appointments so you have the full picture in your records.

Tip

Ask for all your referrals on one sheet and take a photo of it — deadlines are easier to keep track of when the list is in one place.

When to contact a doctor

  • • If a test date falls outside the recommended window, call the clinic and ask about other options.
  • • Bleeding or fluid leaking from the vagina is a reason to contact your doctor or midwife.
  • • Severe headache, visual disturbances, or swelling of the face and hands require contacting the facility.
  • • Painful, regularly recurring contractions are a signal to call without waiting for your appointment.
  • • In a life-threatening situation, call 112.

When to call a doctor or midwife

  • • Bleeding or fluid leaking from the vagina.
  • • Severe headache, visual disturbances, or sudden swelling of the face and hands.
  • • Painful contractions that return 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 20 in detail

Week 20: how your baby is growing — Banana

Week twenty is the symbolic halfway point of pregnancy! Your baby is about the size of a banana (around 165 mm). Swallowing amniotic fluid — practicing the digestive system and breathing in the process. Eyebrows and eyelashes are already visible.

Development at week 20

  • Halfway through pregnancy.
  • Swallowing amniotic fluid — practicing the reflex.
  • Eyebrows and eyelashes visible.
  • Skin thickening, lanugo hair appearing.

Tip

Midwife's tip: you're halfway there — you're amazing. Do something just for yourself today to celebrate this milestone.

Sources

  1. NHS — You and your baby at 20 weeks — www.nhs.uk/pregnancy/week-by-week/13-to-27-weeks/20-weeks-pregnant/
  2. Mayo Clinic — Pregnancy week by week — www.mayoclinic.org/healthy-lifestyle/pregnancy-week-by-week

Week 20: tests and symptoms — complete blood count, anti-D antibodies

At twenty weeks the top of the uterus reaches roughly the level of your belly button, and movements are becoming clearer. It's also time for routine tests: a complete blood count and — if you're Rh negative — a check of anti-D antibodies.

Tests at week 20

  • Complete blood count — checking hemoglobin.
  • Anti-D antibodies if you're Rh negative.
  • Blood pressure and weight check.

Rh incompatibility — good to know

  • It affects Rh-negative women with an Rh-positive partner.
  • Regular antibody monitoring allows early response.
  • Anti-D immunoglobulin is given if needed.

Tip

Midwife's tip: if you're Rh negative, make sure your doctor is monitoring antibodies in the coming weeks. It's standard care, not a cause for worry.

Sources

  1. Polish Ministry of Health — perinatal care standard — www.gov.pl/web/zdrowie/standard-organizacyjny-opieki-okoloporodowej
  2. NHS — Blood group and rhesus status — www.nhs.uk/pregnancy/your-pregnancy-care/blood-tests/

Week 20: Halfway there! — what you can do today

The halfway mark is the perfect time for a little celebration and a keepsake. Your bump is visible now, and you probably have more energy than ever. Take a photo, celebrate the day, and plan your routine tests.

Your tasks for this week

  • Do a bump photo shoot — on your own or with a photographer.
  • Plan your blood count and antibody check (if Rh negative).
  • Keep tracking movements and how you feel.

A keepsake for years

  • Natural light makes the best photos.
  • Add the date and a short note.
  • Repeat the shoot every few weeks — you'll see the progress.

Tip

Midwife's tip: the halfway mark is also a good moment to tick off the anatomy scan and start thinking about your hospital bag — calmly, no rush.

Sources

  1. NHS — You and your baby at 20 weeks — www.nhs.uk/pregnancy/week-by-week/13-to-27-weeks/20-weeks-pregnant/

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.

  1. National Health Fund — prenatal screening program — www.gov.pl/web/nfz/program-badan-prenatalnych
  2. Ministry of Health — "Organizational standards of perinatal care" (regulation) — www.gov.pl/web/zdrowie/standard-organizacyjny-opieki-okoloporodowej
  3. NICE — "Antenatal care" (NG201) — www.nice.org.uk/guidance/ng201
  4. NHS — "Your antenatal appointments" (visits and tests in pregnancy) — www.nhs.uk/pregnancy/your-pregnancy-care/your-antenatal-appointments/
  5. NHS — You and your baby at 20 weeks — www.nhs.uk/pregnancy/week-by-week/13-to-27-weeks/20-weeks-pregnant/
  6. Mayo Clinic — Pregnancy week by week — www.mayoclinic.org/healthy-lifestyle/pregnancy-week-by-week
  7. NHS — Blood group and rhesus status — www.nhs.uk/pregnancy/your-pregnancy-care/blood-tests/

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