Week 3of 40
Trimester 1
from 2 full weeks + 0 days to 2 full weeks + 6 days
The fetus
- Fertilization happens! The sperm meets the egg in the fallopian tube and forms a zygote.
- The zygote begins dividing into more and more cells as it travels toward the uterus.
- By the end of the week, the cell cluster has become a blastocyst with about a hundred cells.
Your body
Physical changes
- The body begins producing hCG hormone after implantation, but levels are still very low.
- Most people notice no changes at all this week.
Common symptoms
- Usually no noticeable symptoms.
- Some may experience light implantation bleeding toward the end of the week.
Good to know
- It is too early to take a pregnancy test — wait until your period is missed.
- Continue living healthily and taking your folic acid.
- Avoid alcohol if you suspect you may be pregnant.
Food & nutrition
Good to eat
- Iron-rich foods such as red meat, beans and spinach.
- Fruits and vegetables rich in vitamin C, which helps iron absorption.
Be aware of
- Avoid unpasteurized dairy products and raw fish if you may be pregnant.
Avoid
- Alcohol — the embryo is especially sensitive in the very first weeks.
- Smoking and secondhand smoke.
Supplements
- Folic acid 400 micrograms daily is the most important supplement right now.
Exercise
You can exercise just as usual. Physical activity does not negatively affect implantation.
Suggested activities
- Walking
- Swimming
- Your regular form of exercise
Sources
The content on this website is based on information from 1177.se and the Swedish Food Agency. It does not replace professional medical advice. Always contact your midwife or doctor with questions about your pregnancy.