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Week 16 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 sixteen is often the moment of the first movements, or the last week of waiting for them. It is also the time when the second-trimester schedule picks up pace — imaging tests and more appointments lie ahead. This week we focus on learning to observe movements and preparing your calendar for the coming weeks.

What to do in week 16

  • Put all known dates of tests and appointments in your calendar.
  • Register for the second-trimester imaging test.
  • Ask at registration how to prepare for the test.
  • Agree with your employer on the deadline for submitting leave documents.
  • Start a note for observations of your baby's movements.

First movements — what to do with them

First movements are often irregular and gentle — that is ordinary at this stage, because the baby still has plenty of room. Instead of tracking them hour by hour, record the general impression: when you feel them, in what position, and what quiets them down. If you had been feeling movements regularly and they have now clearly decreased or disappeared, call your midwife or doctor instead of waiting for the scheduled appointment.

  • Record the date and time of day of the first distinct movements.
  • Notice in which position you feel them best.
  • Do not compare your pace of feeling movements with other pregnant people.
  • Keep a separate note of your observations from the last few days before the visit.
  • Bring your notes to every appointment.

Planning the coming weeks

This is a good moment to lay out on the calendar everything that awaits you: tests, appointments, childbirth preparation classes and official paperwork. Ask at work when it is best to submit the documents related to leave, and check which certificates you need. Also choose one calm day to go through your documents instead of leaving it to the last minute.

  • Put all known dates of tests and appointments in your calendar.
  • Agree with your employer when to submit the leave documents.
  • Sign up for childbirth preparation classes if you want to attend them.
  • Plan one day for sorting out documents and results.

Tip

Set a reminder a week before each appointment — that way you can calmly recall your questions and gather your results.

Preparing for the second-trimester ultrasound

The imaging test in the second trimester — the anatomy scan — assesses the baby's anatomy and takes longer than earlier ultrasounds. Ask at registration how much time to reserve, whether you need to arrive with a full bladder, and whether the facility provides the report right away. Take your pregnancy record and earlier results with you, and if you wish, bring a loved one.

  • Ask how to prepare for the test and what to bring.
  • Reserve more time in your calendar than a routine ultrasound takes.
  • Ask when and in what form you will receive the report.
  • Write down the questions you want to ask after the test.

When to contact a doctor

  • • If movements you had been feeling regularly have clearly decreased, call your midwife or doctor.
  • • Bleeding, fluid leaking, or severe abdominal pain are a reason to contact the facility managing your pregnancy without delay.
  • • In a life-threatening situation, call 112.

Calendar and formalities for the second trimester

The coming weeks are filled with tests, appointments and organizational matters, so it is worth laying them out in one calendar. Record the dates of imaging tests, check-ups and classes, and alongside them the things to arrange: registrations, picking up results, and documents for your employer. Check at each registration whether a referral is needed and how much time to reserve for the test. If one of the dates falls at a busy moment, plan around it early instead of postponing it to the last minute.

  • Put all known dates of tests and appointments in your calendar.
  • Write the things to arrange next to the dates.
  • Check where a referral is needed.
  • Reserve extra time for the imaging test.
  • Agree at work on the deadline for submitting documents.

What to ask when you receive the test report

An imaging test report contains a record of the specialist's observations and measurements, not guidance for reading on your own. The meaning of individual entries depends on the week of pregnancy and earlier results, which is why they are discussed with the doctor managing your care. Before asking about details, prepare a list of the parts that are unclear to you. Also ask whether the result changes the care plan and when the next check-up falls.

  • Write your questions before the appointment where the result is discussed.
  • Ask whether the result changes the plan of tests or appointments.
  • Ask for an explanation of abbreviations you do not understand.
  • Make sure you have a copy of the report in your records.

Second trimester everyday life: work, travel, rest

In the second trimester many people have more energy, but it is still worth adapting your daily plan to your growing belly. At work, more frequent breaks and the option to change position help; on a journey, regular stops, water and your pregnancy record in your hand luggage. Sleep can be easier when you keep consistent hours and choose a side-lying position with support. If tiredness does not pass after rest, or symptoms appear that worry you, mention it at your appointment.

  • Adapt your daily plan to reduced stamina.
  • Take breaks to stretch your legs at work and while traveling.
  • Keep consistent sleep hours and rest during the day.
  • Carry your pregnancy record and the facility's contact details with you.
  • Note symptoms that appear between visits.

When to call a doctor or midwife

  • • A clear decrease in movements you had been feeling regularly.
  • • Bleeding from the birth canal or fluid leaking.
  • • Severe abdominal pain or a persistent fever.

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 16 in detail

Week 16: how your baby is growing — Avocado

At sixteen weeks your baby is about the size of an avocado (around 116 mm). Eyes and ears are in their final position, the legs have become longer than the arms, and the muscles are now strong enough for your baby to do a somersault. This is also when you may feel the first movements.

Development at week 16

  • Eyes and ears in the right places.
  • Legs longer than arms.
  • Active movements — somersaults and turns.

Tip

Midwife's tip: the first movements feel like a butterfly flutter or a gentle ripple in your belly. Moms in second and later pregnancies usually feel them earlier than first-time moms.

Sources

  1. NHS — You and your baby at 16 weeks — www.nhs.uk/pregnancy/week-by-week/13-to-27-weeks/16-weeks-pregnant/
  2. Mayo Clinic — Pregnancy week by week — www.mayoclinic.org/healthy-lifestyle/pregnancy-week-by-week

Week 16: tests and symptoms — mid-pregnancy anatomy ultrasound (book for weeks 18–22)

Week sixteen is the time to book your mid-pregnancy anatomy ultrasound — one of the most important scans of the entire pregnancy. It's done between weeks 18 and 22 and thoroughly assesses your baby's anatomy. It's also the week when many women feel the first movements.

The anatomy scan — what it checks

  • Fetal anatomy: heart, brain, kidneys, spine, limbs, face.
  • Placenta position and amniotic fluid levels.
  • Cervical length (risk of preterm birth).
  • Fetal biometry — size and estimated weight.

First movements — what to expect

  • Experienced moms: often feel movements as early as week 16.
  • First-time moms: usually weeks 18–20.
  • For now, these are gentle flutters, not kicks.

Tip

Midwife's tip: at the anatomy scan you can often find out the baby's sex (if the position cooperates). Be prepared for it to take longer than a regular ultrasound.

Sources

  1. Polish Ministry of Health — perinatal care standard (ultrasound at weeks 18–22) — www.gov.pl/web/zdrowie/standard-organizacyjny-opieki-okoloporodowej
  2. NHS — 20-week screening scan — www.nhs.uk/pregnancy/your-pregnancy-care/20-week-scan/

Week 16: First movements — what you can do today

Week sixteen is the time to tune in to your baby's first signals. Even if you can't feel them yet, note the date when they appear — your midwife will ask about it. And book your anatomy ultrasound so you don't miss the optimal window.

Your tasks for this week

  • Book your anatomy ultrasound for weeks 18–22.
  • Pay attention to gentle 'fluttering' in your belly.
  • Write down the date of the first clear movement.

If you can't feel movements yet

  • That's completely normal — especially in a first pregnancy.
  • An anterior placenta can muffle the sensations.
  • Be patient — by week 20 most women feel movements.

Tip

Midwife's tip: movements are easiest to notice when you're lying on your side, quietly, in the evening. Give yourself a moment of silence to 'chat' with your baby.

Sources

  1. NHS — Your baby's movements — www.nhs.uk/pregnancy/keeping-well/your-babys-movements/

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. NHS — Pregnancy — www.nhs.uk/pregnancy/
  2. Ministry of Health — organizational standards of perinatal care — dziennikmz.mz.gov.pl
  3. WHO — WHO recommendations on antenatal care for a positive pregnancy experience — www.who.int/publications/i/item/9789241549912
  4. National Health Fund — information for patients — www.nfz.gov.pl
  5. NHS — You and your baby at 16 weeks — www.nhs.uk/pregnancy/week-by-week/13-to-27-weeks/16-weeks-pregnant/
  6. Mayo Clinic — Pregnancy week by week — www.mayoclinic.org/healthy-lifestyle/pregnancy-week-by-week
  7. Polish Ministry of Health — perinatal care standard (ultrasound at weeks 18–22) — www.gov.pl/web/zdrowie/standard-organizacyjny-opieki-okoloporodowej
  8. NHS — 20-week screening scan — www.nhs.uk/pregnancy/your-pregnancy-care/20-week-scan/
  9. NHS — Your baby's movements — www.nhs.uk/pregnancy/keeping-well/your-babys-movements/

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