Pregnancy week 1
Your baby this week
There is no baby yet this week, because doctors count pregnancy from the first day of your last menstrual period. Right now your body is shedding the previous lining and beginning to prepare for a new cycle. This is simply the starting point that lets your care team estimate your due date. Think of it as day zero, before ovulation and conception have even happened.
Your body this week
You may simply feel your usual period symptoms, such as mild cramping or shifts in mood. Nothing feels different yet because conception has not occurred. Every woman's experience varies, so be gentle with yourself.
Tips for this week
If you are trying to conceive, this is a good time to begin folic acid after checking with your doctor and to focus on a balanced diet. Try to cut back on caffeine and avoid smoking and alcohol completely. Note the date of your period so you can track ovulation in the coming days.
Frequently asked questions
Which trimester is week 1?+
Week 1 falls in the First trimester.
How many weeks are left at week 1?+
At week 1, you have about 39 weeks to go until the typical 40-week due date.
Is week 1 normal?+
Every pregnancy is different. If you feel well and your check-ups are on track, week 1 is usually a normal part of the journey — but always reach out to your doctor or midwife with any concern.
This guide is for general information and reassurance — it isn't medical advice. Always follow your doctor or midwife for your own pregnancy.