
Baby's Growth and Development at 3 Weeks: Fertilization and Implantation
Although you don't know it yet, you might have conceived already! Fertilization occurs when an egg and sperm connect and form a single cell, called a zygote.
Here’s what’s going on during your 3rd week of pregnancy:

Your Changing Body at 3 Weeks Pregnant: Fertilization and Implantation
You’re 3 weeks pregnant now, but it's too early for you to have missed your period or to experience any symptoms.
Here’s what’s happening inside during your 3rd week of pregnancy:

Wellness and Nutrition at 3 Weeks Pregnant: Fertilization and Implantation
Exercise
If you’re already in good condition and regularly exercising, pregnancy doesn’t prohibit you from keeping on with a safe exercise routine.
At 3 weeks pregnant, just remember:
- Drink plenty of fluids.
- Respond right away if your body indicates that you should slow down or even stop.
- Avoid smoking, alcohol, medications, or exposure to chemicals.
Nutrition for Two
Even earlier than the 3rd week of pregnancy, how well you eat and care for yourself makes a big difference in the quality of nutrition your baby receives.What Do the Nutrients in Your Food Do?
- Calories help nourish your growing baby.
- Iron and folic acid help make the extra blood needed during pregnancy.
- Protein helps produce blood and builds your baby's tissues and muscles.
- Calcium builds your baby's bones and teeth.