The womb is a self-contained though open (not self-sufficient) ecosystem. The Baby's Planet is spatially confined, almost devoid of light and homeostatic. The fetus breathes liquid oxygen, rather than the gaseous variant. He is subjected to an unending barrage of noises, most of them rhythmical. Otherwise, there are very few stimuli to elicit any of his fixed action responses. There, dependent and protected, his world lacks the most evident features of ours. There are no dimensions where there is no light. There is no "inside" and "outside", "self" and "others", "extension" and "main body", "here" and "there". Our Planet is exactly converse. There could be no greater disparity. In this sense - and it is not a restricted sense at all - the baby is an alien. He has to train himself and to learn to become human. Kittens, whose eyes were tied immediately after birth - could not "see" straight lines and kept tumbling over tightly strung cords. Even sense data involve some modicum and modes of conceptualization (see: "Appendix 5 - The Manifold of Sense").
Even lower animals (worms) avoid unpleasant corners in mazes in the wake of nasty experiences. To suggest that a human neonate, equipped with hundreds of neural cubic feet does not recall migrating from one planet to another, from one extreme to its total opposition - stretches credulity. Babies may be asleep 16-20 hours a day because they are shocked and depressed. These abnormal spans of sleep are more typical of major depressive episodes than of vigorous, vivacious, vibrant growth. Taking into consideration the mind-boggling amounts of information that the baby has to absorb just in order to stay alive - sleeping through most of it seems like an inordinately inane strategy. The baby seems to be awake in the womb more than he is outside it.
Cast into the outer light, the baby tries, at first, to ignore reality.
This is our first defense line. It stays with us as we grow up.
It has long been noted that pregnancy continues outside the womb. The brain develops and reaches 75% of adult size by the age of 2 years. It is completed only by the age of 10. It takes, therefore, ten years to complete the development of this indispensable organ - almost wholly outside the womb. And this "external pregnancy" is not limited to the brain only. The baby grows by 25 cm and by 6 kilos in the first year alone. He doubles his weight by his fourth month and triples it by his first birthday. The development process is not smooth but by fits and starts. Not only do the parameters of the body change - but its proportions do as well. In the first two years, for instance, the head is larger in order to accommodate the rapid growth of the Central Nervous System. This changes drastically later on as the growth of the head is dwarfed by the growth of the extremities of the body. The transformation is so fundamental, the plasticity of the body so pronounced - that in most likelihood this is the reason why no operative sense of identity emerges until after the fourth year of childhood. It calls to mind Kafka's Gregor Samsa (who woke up to find that he is a giant cockroach). It is identity shattering. It must engender in the baby a sense of self-estrangement and loss of control over who is and what he is.
The motor development of the baby is heavily influenced both by the lack of sufficient neural equipment and by the ever-changing dimensions and proportions of the body. While all other animal cubs are fully motoric in their first few weeks of life - the human baby is woefully slow and hesitant. The motor development is proximodistal. The baby moves in ever widening concentric circles from itself to the outside world. First the whole arm, grasping, then the useful fingers (especially the thumb and forefinger combination), first batting at random, then reaching accurately. The inflation of its body must give the baby the impression that he is in the process of devouring the world. Right up to his second year the baby tries to assimilate the world through his mouth (which is the prima causa of his own growth). He divides the world into "suckable" and "insuckable" (as well as to "stimuli-generating" and "not generating stimuli"). His mind expands even faster than his body. He must feel that he is all-encompassing, all-inclusive, all-engulfing, all-pervasive. This is why a baby has no object permanence. In other words, a baby finds it hard to believe the existence of other objects if he does not see them (=if they are not IN his eyes). They all exist in his outlandishly exploding mind and only there. The universe cannot accommodate a creature, which doubles itself physically every 4 months as well as objects outside the perimeter of such an inflationary being, the baby "believes". The inflation of the body has a correlate in the inflation of consciousness. These two processes overwhelm the baby into a passive absorption and inclusion mode.
To assume that the child is born a "tabula rasa" is superstition. Cerebral processes and responses have been observed in utero. Sounds condition the EEG of fetuses. They startle at loud, sudden noises. This means that they can hear and interpret what they hear. Fetuses even remember stories read to them while in the womb. They prefer these stories to others after they are born. This means that they can tell auditory patterns and parameters apart. They tilt their head at the direction sounds are coming from. They do so even in the absence of visual cues (e.g., in a dark room). They can tell the mother's voice apart (perhaps because it is high pitched and thus recalled by them). In general, babies are tuned to human speech and can distinguish sounds better than adults do. Chinese and Japanese babies react differently to "pa" and to "ba", to "ra" and to "la". Adults do not - which is the source of numerous jokes.
The equipment of the newborn is not limited to the auditory. He has clear smell and taste preferences (he likes sweet things a lot). He sees the world in three dimensions with a perspective (a skill which he could not have acquired in the dark womb). Depth perception is well developed by the sixth month of life.
Expectedly, it is vague in the first four months of life. When presented with depth, the baby realizes that something is different - but not what. Babies are born with their eyes open as opposed to most other animal young ones. Moreover, their eyes are immediately fully functional. It is the interpretation mechanism that is lacking and this is why the world looks fuzzy to them. They tend to concentrate on very distant or on very close objects (their own hand getting closer to their face). They see very clearly objects 20-25 cm away.
But visual acuity and focusing improve in a matter of days. By the time the baby is 6 to 8 months old, he sees as well as many adults do, though the visual system - from the neurological point of view - is fully developed only at the age of 3 or 4 years. The neonate discerns some colors in the first few days of his life: yellow, red, green, orange, gray - and all of them by the age of four months. He shows clear preferences regarding visual stimuli: he is bored by repeated stimuli and prefers sharp contours and contrasts, big objects to small ones, black and white to colored (because of the sharper contrast), curved lines to straight ones (this is why babies prefer human faces to abstract paintings). They prefer their mother to strangers. It is not clear how they come to recognize the mother so quickly. To say that they collect mental images which they then arrange into a prototypical scheme is to say nothing (the question is not "what" they do but "how" they do it). This ability is a clue to the complexity of the internal mental world of the neonate, which far exceeds our learned assumptions and theories. It is inconceivable that a human is born with all this exquisite equipment while incapable of experiencing the birth trauma or the even the bigger trauma of his own inflation, mental and physical.
As early as the end of the third month of pregnancy, the fetus moves, his heart beats, his head is enormous relative to his size. His size, though, is less than 3 cm. Ensconced in the placenta, the fetus is fed by substances transmitted through the mother's blood vessels (he has no contact with her blood, though). The waste that he produces is carried away in the same venue.