Pregnancy Week-by-Week Tracker
Enter the first day of your last period to see how far along you are, your trimester (which third of pregnancy you are in), and a note on what is often happening around now. Your scan gives the most accurate dates.
When to see a doctor
Seek care for bleeding, severe pain, a high fever, severe vomiting, strong headaches with vision changes, or reduced baby movements later in pregnancy. When unsure, always call.
How this week by week pregnancy tracker works
Enter the first day of your last period and press the button. The tracker counts the days from that date to today, divides by 7, and shows the whole weeks plus the days left over. Under 13 weeks it calls you first trimester, under 28 weeks second trimester, and after that third trimester. Pregnancy is counted from the first day of your last period. On a 28 day cycle you are already about 2 weeks pregnant when an egg is fertilised. The tracker works out your due date as 280 days after the date you enter and saves it on this phone, so the other pregnancy tools open already knowing it. Nothing is sent to us. If your cycle is not 28 days, or you are not sure of the date, use the due date calculator to adjust for your cycle.
What your week and note mean
The note under your week is a typical note for that stretch of pregnancy. It is not a description of your own pregnancy. Your midwife or doctor and your scans decide your dates, and the National Health Service (NHS) says a scan can estimate how many weeks pregnant you are more accurately than a last period date. This is what the tracker says for each stretch.
| Your week | What the note tells you |
|---|---|
| Under 5 weeks | Very early. A test may only just be positive. Start folic acid if you have not. |
| 5 to 8 weeks | The baby's major organs are forming. Nausea and tiredness are common. Register at an antenatal clinic if you have not. |
| 9 to 12 weeks | The first trimester is ending. Your first scan is often around now. Sickness often begins to ease. |
| 13 to 18 weeks | The second trimester. Many women feel more energy, and you may start to show. |
| 19 to 24 weeks | Many women feel the first movements. The detailed scan near week 20 checks how your baby is growing. |
| 25 to 28 weeks | Entering the third trimester. Start thinking about your hospital bag and birth plan. |
| 29 to 36 weeks | Getting closer. Rest, watch your baby's movements and pack your hospital bag by about week 36. |
| 37 to 42 weeks | Full term. Know the signs of labour and when to go in. |
For what is happening in each trimester in more detail, read pregnancy trimester by trimester. For your hospital bag, use the hospital bag checklist.
Week by week pregnancy in Nigeria: what to do at each stage
The tracker mentions booking. That is your first antenatal visit, and the NHS says it usually happens between 8 and 12 weeks. Ask the clinic you plan to use what their booking schedule is, because it can differ from the NHS one. Ask about malaria prevention at that visit too. The World Health Organization (WHO) lists pregnant women among the groups at higher risk from malaria. Our antenatal appointment questions give you a list to take with you.
Will I test positive at 5 weeks pregnant?
The NHS page for 5 weeks says pregnancy tests are sensitive from about week 3 or 4, so this is a good time to test. If your period is late and a test is negative, speak to your midwife or doctor rather than guessing.
How does my stomach feel at 5 weeks pregnant?
The NHS lists cramping and bloating among the possible signs at 5 weeks, along with extreme tiredness, nausea, sore breasts, a metallic taste, mood swings, a heightened sense of smell and needing to pee more often. It says your period may be late and you may feel unwell. It also says light bleeding can be implantation bleeding, when the embryo attaches to the lining of the womb. It says to see your doctor if you get bleeding in pregnancy, so contact your doctor or clinic when it happens.
What should I avoid in week 5 of pregnancy?
The NHS says to stop smoking, cut out alcohol and limit caffeine. It says not to stop regular medication without speaking to your doctor first, and to take 400 micrograms of folic acid a day until at least week 12. It says you do not need to eat for 2. Our safe foods checklist covers what to eat and what to leave.
How are you supposed to feel at 3 weeks pregnant?
At 3 weeks counted from your last period, you are within about a week of conception on a 28 day cycle, and there is usually little to notice. Your period is not late yet. This is the stretch the tracker calls very early. The signs the NHS lists for week 5 are the ones to look for from week 4 or 5 onward, and a late period is one of the first.
Common questions
Will I test positive at 5 weeks pregnant?
How does my stomach feel at 5 weeks pregnant?
What should I avoid in week 5 of pregnancy?
When is the booking appointment?
How are weeks counted in pregnancy?
Where this comes from
- You and your baby at 5 weeks pregnant. National Health Service.
- Pregnancy due date calculator. National Health Service.
- Your antenatal care and appointments. National Health Service.
- Malaria fact sheet. World Health Organization.
This page has not yet been reviewed by a clinician. It stands on the published guidance above, and we say so plainly rather than implying a review that has not happened. Read it alongside our medical policy.
Go further
The First Pregnancy Plan
A community for all pregnant women, week-by-week support, and a midwife or doctor to ask.
See the program →