It means that you don't really respond to outside stimulus with very much emotion or with the same behaviorisms that most other people would in the same situation. Let me try to give you an example. Say someone tells you that the sky is blue. Normal affect would be baseline, meaning your usual facial expression.
The fetusâ heart begins to beat at 5 weeks gestation, at around 80-85 beats per minute. This rate increases about 3 beats per minute per day during the first month. When the fetus heart is first developed it resembles that of a tube. As the fetus begins to grow, so does the heart. Due to lack of room, that tube begins to bend and twist, beginning to take on the shape of a normal human heart.
Experts now agree most unborn babies can hear sometime in the third trimester, some as early as 20 weeks. Sonograms have shown a fetus to turn its head toward a sound, and very loud or startling sounds can speed up a baby's heart rate or movements. Naturally, the baby can hear your voice, your heartbeat, and other sounds your body makes as blood flows through your veins and your stomach digests food.