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Week 13 of pregnancy — what is happening and what to do

Mamiqa Editorial Team · updated September 12, 2026 · 7 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 thirteen closes the first trimester and changes the rhythm of care. Appointments usually become less frequent, and in between you are left with more independence — and organizing this period is often the hardest part. This week we tidy up your first-trimester records and set out how to manage between appointments.

What to do in week 13

  • Review all your test results from the start of pregnancy and fill in any gaps.
  • Ask for the plan of visits and tests for the second trimester.
  • Write down the facility's phone number for outside clinic hours.
  • Set a calendar reminder for your next appointment.
  • Start a note for symptoms and questions between visits.

Closing out the first trimester

Review all the tests done since the beginning of your pregnancy and check that none was left without a result or without being discussed. Ask the doctor for a summary: what has been done, what raised no concerns, and what needs follow-up. This is a good moment to establish which documents still need to be delivered and which stay at the facility.

  • Check the completeness of your results — from the first test to today.
  • Ask for a short summary of your care so far.
  • Confirm that all results have been discussed.
  • Ask which documents are still missing from your pregnancy record.
  • Put the date of your next appointment in your calendar.

Tip

Take photos of your most important results and keep them in one album on your phone. At an appointment at another facility they are often needed on the spot.

What second-trimester care looks like

In the second trimester appointments are usually less frequent than early in pregnancy, and some tests are planned in advance. Ask how often you will be seen, who your main contact is, and whether a continuity midwife is available at the facility. Also note where to turn if a question comes up outside clinic hours.

  • How often will I have appointments in the second trimester?
  • Who is my main contact: the doctor or the midwife?
  • Where do I call if a question comes up in the evening or on a weekend?
  • Which tests should I schedule in advance, and where?

What to do between appointments

Less frequent visits do not mean less attention — they mean that part of the observing is yours to do. Note down dates, symptoms that surprised you, and the questions that have built up since the last visit. Bring this list to the next appointment: a concrete description with dates is far easier to discuss than a vague sense that something was going on.

  • Note symptoms together with the date and how often they occur.
  • Write questions down as soon as they appear, not just before the visit.
  • Take your list to every appointment and tick off what has been discussed.
  • If something needs a quick answer, call the facility instead of waiting.

When to contact a doctor

  • • If bleeding, fluid leaking, or severe abdominal pain appears between appointments, call the facility managing your pregnancy.
  • • In a life-threatening situation, call 112.

Second trimester everyday life: energy, work, sleep

In the second trimester many people feel better, though tiredness can return in waves — especially after a day full of obligations. At work it is worth considering simple changes: more frequent breaks, the option to stand up from your desk, and a comfortable place to sit. At home, a steady sleep rhythm and a short moment of rest during the day help. If tiredness lasts several days, treat it as a signal to slow down and mention it at your next appointment.

  • Take short breaks during your working day.
  • Make sure you have a comfortable seat and back support.
  • Keep consistent times for sleep and rest.
  • Note the days when tiredness is greater.
  • Ask at your appointment for guidance on work and activity.

Questions for your next appointment — a ready list

Second-trimester visits can be short, so a list of questions prepared in advance works like a conversation plan. It should cover not only tests but also everyday life and how your care is organized. Write your questions in order from most important, and after the visit add whatever did not get covered — that is the first item for the next meeting.

  • Which second-trimester tests should I schedule now?
  • Are referrals needed, and where do I register?
  • What changes to work and activity are recommended in my situation?
  • How should I keep notes of my observations between visits?
  • Who do I call if a question comes up in the evening?

Calendar of tests and documents for the coming weeks

Keep one calendar where, alongside appointments, you record also the things to arrange: registrations, picking up results, submitting documents and questions for the facility. At your appointment, ask for a short summary of the plan for the coming weeks and compare it with what you have written down. That way you will notice sooner if a test has not been scheduled or a result has not arrived. Keep documents in one place, and keep copies of test reports in file form as well.

  • Record all known dates in one calendar.
  • Mark the things to arrange between appointments.
  • Ask for the care plan summary in writing.
  • Check that all results have reached the facility.
  • Keep copies of test reports both on paper and as files.

When to call a doctor or midwife

  • • Bleeding from the birth canal or fluid leaking.
  • • Severe, persistent abdominal pain.
  • • Fever, chills, or intense vomiting.

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 13 in detail

Week 13: how your baby grows — A lemon

In week thirteen your little one is the size of a lemon (about 74 mm). The head now makes up about one third of the body's length. The brain is developing rapidly and the vocal cords are beginning to form — the face is becoming more distinct, and your little one looks increasingly 'human'.

Development in week 13

  • The head is now 1/3 of the body — proportions are changing.
  • Rapid brain development.
  • The vocal cords are forming.

Tip

Midwife's tip: this is the end of the first trimester — the symbolic transition into the 'golden period', when energy usually returns.

Sources

  1. NHS — You and your baby at 13 weeks — www.nhs.uk/pregnancy/week-by-week/1-to-12-weeks/13-weeks-pregnant/
  2. Mayo Clinic — Pregnancy week by week — www.mayoclinic.org/healthy-lifestyle/pregnancy-week-by-week

Week 13: tests and symptoms — Blood count + urine test

Week thirteen opens the second trimester — often called the golden period of pregnancy. Nausea usually eases off, energy returns, and libido rises. Your bump is starting to show, which for many mums is the first 'proof' of the pregnancy.

Tests to start the second trimester

  • Blood count.
  • General urine test.
  • Blood pressure and weight checks with your doctor.

What to watch for

  • Rising energy and mood.
  • The appearance of a visible bump.
  • A possible return of libido — that's normal.

Tip

Midwife's tip: with energy returning, it's the perfect time for gentle activity (walking, swimming) — it prepares your body for the coming weeks and for birth.

Sources

  1. Ministry of Health — standard of perinatal care — www.gov.pl/web/zdrowie/standard-organizacyjny-opieki-okoloporodowej
  2. NHS — Antenatal checks and tests — www.nhs.uk/pregnancy/your-pregnancy-care/antenatal-checks-and-tests/

Week 13: The second trimester! — what you can do today

Welcome to the second trimester! Energy is coming back, so it's the perfect time to invest in comfort and in things that will make the coming months easier.

Your tasks for this week

  • Buy your first comfortable maternity leggings or trousers.
  • Plan a gentle return to activity (swimming, walking, yoga).
  • Start pelvic floor exercises, if you haven't yet.

Comfort to start with

  • Comfortable clothes reduce pressure on your belly.
  • Flat shoes support your spine.
  • A maternity bra will make a difference with tender breasts.

Tip

Midwife's tip: the second trimester is the best time to travel if you fancy it — you'll usually feel your best right now.

Sources

  1. NHS — Benefits of exercise in pregnancy — www.nhs.uk/pregnancy/keeping-well/exercise/

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. Ministry of Health — organizational standards of perinatal care — dziennikmz.mz.gov.pl
  2. WHO — WHO recommendations on antenatal care for a positive pregnancy experience — www.who.int/publications/i/item/9789241549912
  3. NHS — Antenatal care — www.nhs.uk/pregnancy/
  4. Institute of Mother and Child — educational materials — imid.med.pl/pl/
  5. NHS — You and your baby at 13 weeks — www.nhs.uk/pregnancy/week-by-week/1-to-12-weeks/13-weeks-pregnant/
  6. Mayo Clinic — Pregnancy week by week — www.mayoclinic.org/healthy-lifestyle/pregnancy-week-by-week
  7. Ministry of Health — standard of perinatal care — www.gov.pl/web/zdrowie/standard-organizacyjny-opieki-okoloporodowej
  8. NHS — Antenatal checks and tests — www.nhs.uk/pregnancy/your-pregnancy-care/antenatal-checks-and-tests/
  9. NHS — Benefits of exercise in pregnancy — www.nhs.uk/pregnancy/keeping-well/exercise/

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Publisher: Zordon Intelligence sp. z o.o., KRS 0001190915, NIP 7252358503. This content is educational and does not replace medical consultation.