First trimester · 1 weeks pregnant
Week 1: your period
Pregnancy is counted from here, although conception is still two weeks away.
Doctors count pregnancy from the first day of your last period, so week 1 is your period itself. Nothing is growing yet, but your body is already preparing an egg.
Size and weight
About the size of
no baby yet
Length
—
Weight
—
Averages from standard growth charts. Measured crown to rump until week 20 and head to heel afterwards.
How your baby is developing
- The lining of the uterus is shed, which is your period.
- Hormones from the brain tell the ovaries to start maturing a group of follicles, one of which will release this cycle's egg.
- Your due date is counted from this week: 40 weeks from the first day of this period.
How you may feel
- Period bleeding and cramps
- Tiredness or low mood from the hormone dip
- Breast tenderness easing as the period starts
If you are planning a pregnancy, this is the ideal moment to start the habits that matter most in the first weeks after conception.
What's next
Tests and appointments
- A preconception visit at your polyclinic is a good idea if you have not had one: review long-term conditions, medicines, vaccinations and family history.
What to do this week
- Take folic acid every day: the national protocol in Uzbekistan recommends 1 mg (1000 µg) from three months before conception until 12 weeks. It lowers the risk of spina bifida.
- Uzbekistan is an iodine-deficient region: take 200 µg of potassium iodide daily throughout pregnancy and breastfeeding unless your doctor advises otherwise.
- Stop smoking and alcohol, and cut back on caffeine to under 200 mg a day (about two cups of coffee).
- Note the first day of this period. You will be asked for it many times.
- Check with a pharmacist or doctor that any regular medicines are safe in pregnancy.
Call your doctor or maternity hospital if
- Very heavy periods, severe period pain or cycles shorter than 21 or longer than 35 days are worth discussing with a doctor before trying to conceive.
If something feels wrong, trust yourself and call 103 or your maternity hospital. You will never be wasting anyone's time.
Not sure this is your week?
Enter your last period or due date and we will show the right page and your checkup timeline.
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