Fetal Development DAY 1 הפריה הוכן ע"י: ענבל קרוב

At conception, the sperm joins with ovum (egg) to form one cell that contains the complex genetic blueprint for every detail of human development. At this point the child's sex, hair and eye color, height, and skin tone are already mapped out Week 2:

DAY 35 Five fingers can be discerned in the hand. The eyes darken as pigment is produced. Week 3 DAY 21 The heart begins to beat. DAY 30 At one month old, the embryo is 10,000 times larger than the original fertilized egg and is developing rapidly. The heart is pumping increasing quantities of blood through the circulatory system. The placenta forms a unique barrier that keeps the mother's blood separate while allowing food and oxygen to pass through to the embryo.

The embryo's heart has been beating for one week already. The beginning of the spinal cord, muscles, and nerves become apparent. Arms, legs, eyes and ears can now be seen. The amniotic sac and placenta are in place and providing nourishment to the embryo. Week 4: התפתחות מהירה:

This is a critical period of growth for the embryo. The eyes begin to form and the extremities can be seen in much more detail, including all 10 fingers. The embryo is now moving and responds to touch. Week 6:

At a little more than an inch long, the developing life is now called a foetus - Latin for "young one" or "offspring". Everything is now present that will be found in a fully developed adult. The heart has been beating for more than a month, the stomach produces digestive juices and the kidneys have begun to function. Forty muscle sets begin to operate in conjunction with the nervous system. The baby's body responds to touch, although the mother will not be able to feel movement until the fourth or fifth month. Week 8

Fingerprints are already evident in the skin. The baby will curve its fingers around an object placed in the palm of its hand. Week 9

At the 9th week the embryo is now considered a fetus. The fetus is able to grasp and can suck his/her thumb. Fingerprints are already visible in the skin. In addition to being able to sense touch, the fetus can now feel pain. At week 12, the fetus sleeps and awakens. Week 10:

The fetus is growing very rapidly at this point. The mother can now feel energetic movement, and hair is visible on the scalp. Sex differentiation becomes apparent by week 13 Week 14:

The ears are now functioning and the baby can hear his mother's voice. By the end of the 4th month, the fetus weighs a half pound or more and is eight to ten inches in length. Week 18:

The head of the fetus now accounts for 1/3 of his/her length. If this baby were to be born prematurely, he/she has a good chance of survival with sufficient medical care. Week 22:

The tongue has formed taste buds and the eyes have fully developed. The baby's lungs are completely functioning and he can even cry Week 26:

Vision, hearing, taste, and touch are all being used now. The baby opens and closes her eyes and looks around. Research shows that the child can recognize her mother's voice. Week 30:

Half the pregnancy has now passed, and the baby is about 12 inches long. The mother has definitely begun to feel movement by now. If a sound is especially loud or startling, the baby may jump in reaction to it. Week 30

The baby is now ready for life outside of his mother's womb. By this time, the infant usually weighs six to nine pounds and his heart is pumping 300 gallons of blood per day Week 40: