The first trimester - your baby’s development and a preparation checklist
PREGNANCY / Parent Library
Your baby’s development, essential preparations and questions for your first appointments.
The early weeks do not need to follow a perfect plan
A positive test can bring happiness, surprise, anxiety or several emotions at once. You do not have to choose a maternity hospital and buy everything for your baby immediately. A smaller list is useful at first: maternity care, documents, questions and contact details for someone who can help. This keeps time-sensitive arrangements from getting lost among shopping and online advice.
How does your baby develop in the first trimester?
This is a time when organs begin to form and limbs and facial features take shape. Development is rapid, but assessing it requires an examination. In our series, the first trimester ends at 13 weeks and 6 days. Popular calendars may use slightly different boundaries; for test appointments, always use the specific weeks agreed with your clinic.
Gather information before your appointment
Prepare a list of long-term conditions, previous procedures, medicines and supplements. If you have older results, ask which are useful to bring. Give your care professional the exact names and doses of your medicines instead of stopping treatment yourself. Write down your questions too. It is easy to forget something in the consulting room that seemed important the night before.
What is worth arranging in advance?
Ask about the schedule of upcoming tests, antenatal education and a referral to the prenatal screening programme. In Poland, the programme covers pregnant women regardless of age, and individual services have specific time windows. This is a good reason to start arranging appointments early. It does not mean you should choose every available test yourself.
Use the checklist at your own pace
The PDF combines brief information about development with a preparation checklist and questions to ask. You can print only the pages you need. Add the people you want to share your news with and the kinds of support you would find helpful. There is no single right moment for every personal announcement, and you do not have to compare your energy levels with other mothers’ experiences.
Frequently asked questions
Do I need to start shopping for the baby already?
You can begin by noticing your own needs and writing down ideas. Shopping does not have to be the first task. If you want to plan something, set a budget and decide where things will go. Many decisions can wait. At this stage, the list mainly helps you remember appointments, referrals and questions.
Why might my pregnancy week differ from my own calculations?
Gestational age is described using an agreed method, rather than simply the time since a positive test. Your care professional can explain how it was determined in your situation. Record one agreed due date in your organiser and ask about any changes. Do not adjust it yourself using different calculators.
Does the shape of my bump show how my baby is developing?
A photograph of a bump cannot replace a medical assessment. Many factors affect body shape, so comparisons with other people cannot tell you whether a pregnancy is progressing normally. If a particular change concerns you, describe it at your appointment. The photographs in our material are illustrative, not diagnostic.
How can I prepare for a conversation when I have many worries?
Write down the three things that matter most to you and start with those. You can ask for an explanation in simpler words or make a note of the answer. Bring someone close to you if you would like. You do not need to know medical terminology to explain how you feel and what concerns you.
How to use this material
Read the checklist, mark the items relevant to your circumstances and add your own arrangements. Follow individual advice for health matters. After a conversation, record the next step and date; return to the material as your needs change.
Sources and updates
Sources were checked on 18.10.2026. The content was additionally compared with publications from HSE (Ireland) and Healthdirect Australia / Pregnancy, Birth and Baby. This is an editorial source check, not a medical review. These institutions have not approved the OutletBaby materials.
This translation was prepared with AI assistance and checked editorially. The material has not undergone a medical review.
- ACOG - How Your Fetus Grows During Pregnancy
- NHS - Week 12
- Dziennik Ustaw / ELI - Standard opieki okołoporodowej, tekst jednolity, Dz.U. 2026 poz. 1140
- NFZ / Pacjent.gov.pl - Program badań prenatalnych
- HSE, Irlandia - 9 to 12 weeks pregnant
- Healthdirect Australia / Pregnancy, Birth and Baby - Conception and fetal development