[b]When does the heart begin to beat?[/b]
At 18 days [when the mother is only four days late for her first menstrual period], and by 21 days it is pumping, through a closed circulatory system, blood whose type is different from that of the mother.
[b]When is the brain functioning?[/b]
Brain waves have been recorded at 40 days on the Electroencephalogram (EEG).
[b]When does the developing baby first move?[/b]
"In the sixth to seventh weeks. . . . If the area of the lips is gently stroked, the child responds by bending the upper body to one side and making a quick backward motion with his arms. This is called a ‘total pattern response’ because it involves most of the body, rather than a local part."
At eight weeks, "if we tickle the baby’s nose, he will flex his head backwards away from the stimulus."
[b]When are all his body systems present?[/b]
By eight weeks.
[b]How about nine weeks?[/b]
At nine to ten weeks, he squints, swallows, moves his tongue, and if you stroke his palm, will make a tight fist.
By nine weeks he will "bend his fingers round an object in the palm of his hand."
[b]When does he start to breathe?[/b]
"By 11 to 12 weeks (3 months), he is breathing fluid steadily and continues so until birth. At birth, he will breathe air. He does not drown by breathing fluid within his mother, because he obtains his oxygen from his umbilical cord. This breathing develops the organs of respiration."
[b]Can he cry?[/b]
Although the watery environment in which he lives presents small opportunity for crying, which does require air, the unborn knows how to cry, and given a chance to do so, he will. A doctor
". . . injected an air bubble into the baby’s amniotic sac and then took x-rays. It so happened that the air bubble covered the baby’s face. The whole procedure had no doubt given the little fellow quite a bit of jostling about, and the moment that he had air to inhale and exhale they heard the clear sound of a protesting wail emitting from the uterus. Late that same night, the mother awakened her doctor with a telephone call, to report that when she lay down to sleep the air bubble got over the baby’s head again, and he was crying so loudly he was keeping both her and her husband awake. The doctor advised her to prop herself upright with pillows so that the air could not reach the baby’s head, which was by now in the lower part of the uterus."
[b]Does the unborn baby dream?[/b]
Using ultrasound techniques, it was first shown that REM (rapid eye movements) which are characteristic of active dream states have been demonstrated at 23 weeks.
REM have since been recorded 17 weeks after conception.
[b]Does he/she think?[/b]
We now know that the unborn child is an aware, reacting human being who from the sixth month on (and perhaps earlier) leads an active emotional life.
The fetus can, on a primitive level, even learn in utero.