During pregnancy, your body goes through many changes. Some common symptoms of early pregnancy may include a missed period, nausea, breast tenderness, frequent urination, tiredness, food cravings or aversions, dizziness, and mood swings.

The following pregnancy definitions and fetal development descriptions will help you make a fully informed decision about your pregnancy options.

Day 1: Conception can occur as early as 15 minutes after having intercourse or even up to 3 days afterward. The baby’s features, including gender and hair and eye color have been determined at conception. The baby has 23 chromosomes each from the mother and father, but is a separate, unique human being.

3-6 weeks: The heart is beating. Blood flows in the baby’s veins. The baby has his/her own blood type, separate from the mother’s. The mouth, eyes, ears, and nose take shape. The brain coordinates the movement of muscles and organs. Reflex responses have begun.

7 weeks: The baby begins to move spontaneously. Brain waves can be recorded. Teeth buds are forming. The eyes have retina and lens. Fingers and toes are developed. Lips are sensitive to touch.

8 weeks: The baby is well proportioned. Every organ is present. The heart beats sturdily. The stomach produces digestive juices. The liver makes blood cells. The kidneys begin to function. Eyelids and palms of hands are sensitive to touch.

This information is intended for general educational purposes only and should never be relied upon as a substitute for professional medical advice.

This information comes from The American Pregnancy Association and "The First Nine Months", published by Focus on the Family.  This information is intended for general education purposes only and should not be relied upon as a substitute for professional and/or medical advice.