Day 1
Fertilization (also known as conception) is when human life beings.
According to the Merriam-Webster online medical dictionary, fertilization is defined as follows:
According to the Merriam-Webster online medical dictionary, fertilization is defined as follows:
fer-til-iza-tion noun
: an act or process of making fertile: as
a : an act or process of fecundation, insemination, or impregnation
b : the process of union of two gametes whereby the somatic chromosome number is restored and the development of a new individual is initiated
: an act or process of making fertile: as
a : an act or process of fecundation, insemination, or impregnation
b : the process of union of two gametes whereby the somatic chromosome number is restored and the development of a new individual is initiated
The male sperm joins with the female ovum, or egg, to form one cell, which is smaller than a grain of salt. The new human life has inherited 23 chromosomes from the mother, and 23 chromosomes from the father, totalling 46 human chromosomes. This one cell contains the complex genetic blueprint, DNA, for every single detail a human being's development - sex, eye color, hair color, height, skin color, etc.
Fertilization
When the male sperm and female ovum meet, they for a single new cell, called a zygote, creating a new unique human life. For the next few days the living human zygote will make his/her way down the fallopian tube and into the uterus, where the uterine lining has been prepared for implantation.
Zygote, as defined by the Merriam-Webster online medical dictionary:
zy-gote noun
: a cell formed by the union of two gametes; broadly : the developing individual produced from such a cell
: a cell formed by the union of two gametes; broadly : the developing individual produced from such a cell
Human ZygoteEvery human being begins as a separate single cell. Nothing new is added but oxygen, nutrition, and time. If the process is not interrupted, a human being lives for about nine months in his/her mother's womb and for decades outside of it. That human person is unique - he/she has never existed before and will not exist again.
All human characteristics of this newly created person - sex, eye color, hair color, skin color, etc. - are determined at fertilization by the DNA code in the 46 human chromosomes.
Days 5-9
Within the first week after fertilization, the new human being implants in the lining of the mother's uterus. This is where he/she is nourished and continues to develop.
Implantation
Days 10-14
Now attached to the lining of the uterus, the developing human being is now called an embryo. The human embryo makes his/her presence know by signaling mother's body through chemicals and hormones. This prevents the mother from menstruating.
Day 21
The heart of the living human embryo is now formed and beating, pumping blood (with his/her own blood type) through a closed cirulatory system. The beginning stages of the brain, spinal cord, and nervous system are also established.
Human Embryo at 3 Weeks
Day 28
Arms, legs, ears, and eyes, have started growing. The backbone, muscles, and respiratory system of the embryo are also beginning to form.
Arms, legs, ears, and eyes, have started growing. The backbone, muscles, and respiratory system of the embryo are also beginning to form.
Day 30
Now 4 weeks old, the living human embryo is 10,000 times larger than the original fertilized egg, and developing very rapidly. The embryo's heart is pumping increasing amounts of blood through his/her closed circulatory system. The placenta, which is an organ, serves as a barrier that keeps the mother's blood separate disposes of toxins, while allowing nurishment and oxygen to pass through to the embryo.
Now 4 weeks old, the living human embryo is 10,000 times larger than the original fertilized egg, and developing very rapidly. The embryo's heart is pumping increasing amounts of blood through his/her closed circulatory system. The placenta, which is an organ, serves as a barrier that keeps the mother's blood separate disposes of toxins, while allowing nurishment and oxygen to pass through to the embryo.
Week 5
The embryo's four limb buds now appear. The arms first, then the legs. Five fingers can be seen on each of the hands. The embryo's head, which is at this time disproportionately large compared to the rest of his/her body, is flexed over the rest of the body. The legnth of the embryo is about a quarter inch. The umbilical cord connects the embryo to the placenta and the yolk sac, which creates blood cells during the first few weeks of life.
Human Embryo at 5 WeeksWeek 6
At this point of the tiny human being's development, brain waves can be detected and recorded with an electroencephalogram. The embryo's liver is now producing blood cells, and the brain begins to controls of organs and muscles.
Human Embryoat 6 Weeks
The mother is about to miss her second period, and has probably discovered that she is pregnant.
BRAIN WAVES
The end of a human life can be defined as the cease of brain waves. The scientific evidence that brain waves exist in preborn babies proves that human life begins in the womb.
Week 7
The end of a human life can be defined as the cease of brain waves. The scientific evidence that brain waves exist in preborn babies proves that human life begins in the womb.
Week 7
The human embryo begins to move about in the womb. The jaw is forming, including teeth buds within the gums. Eyelids will soon seal shut to protect the embryo's developing eyes, which are sensitive to light. The eye lids will not re-open until about the seventh month of life in the womb.
Human Embryoat 7 Weeks
Weeks 8-9
The developing human being is now known as a fetus, which is later for “young one”. All body systems are now present. His/her heart has been beating for over month now, and he/she can squint, swallow, move its tongue, suck its thumb, clench objects placed in his/her palm, and make a fist. Unique fingerprints are present. The stomach produces digestive juices, and the kidneys are now functional. The baby's body has reflexes, responds to touch, and can feel pain.
Human Fetus at 8 Weeks 
Human Fetus at 9 WeeksWeeks 10-11
The living human fetus is now approximately 2 inches long. He/she swallows amniotic fluid and urinates. Muscle movements are becoming more coordinated. The baby can now wrinkle his forehead, has fingernails, and makes spontaneous breathing movements.
Human Fetus at 10 Weeks 
Human Fetusat 11 Weeks
Weeks 12-13
The baby now sleeps, awakens, and moves energetically. He/she curls her toes, turns her head, and opens and closes her mouth. The baby will make a fist when his/her palm is stroked, and is now breathing amniotic fluid in and out to help develop his/her respiratory system. Hair has begun growing on the baby's head and the sex may be determined by ultrasound.
Human Fetus at 12 Weeks 
Human Fetusat 13 Weeks
Weeks 14-17
The living human fetus is now approximately eight to ten inches long and weighs half a pound or more. This is about the time that the mother begins to "show." The baby's ears are functional and he/she can hear her mothers voice, heartbeat, and some noises in the outside world.
The living human fetus is now approximately eight to ten inches long and weighs half a pound or more. This is about the time that the mother begins to "show." The baby's ears are functional and he/she can hear her mothers voice, heartbeat, and some noises in the outside world.
Human Fetus at 14 Weeks 
Human Fetusat 15 Weeks
Human Fetusat 16 Weeks
Human Fetus at 17 WeeksWeeks 18-19
The developing child has nearly reached viability. Viability is the time when the baby is able to live outside the mother’s womb. Not long ago, viability was 30 weeks. Then it became 25 weeks. Now viability is even sooner, as babies have been born at as early as 21 weeks and survived. Science and medicine is continually making progress in the area of premature neonatal care.
Human Fetus
at 19 Weeks
Human Fetusat 19 Weeks
Weeks 20-23
The mother's pregnancy is now halfway through, and the baby is about 12 inches long. The mother can now feel the baby's movements within her womb. The baby may be startled and jump in reaction to a loud noise outside the womb.
Human Fetusat 20 Weeks
Human Fetus at 21 Weeks 
Human Fetus at 23 Weeks
If born prematurely, babies are routinely saved at 21 to 22 weeks after fertilization.
This baby was born prematurelyat 23 weeks and survived.
Month 6
The baby's delicate skin is protected from the amniotic fluid by a special waxy coating called “vermix”. Oil and sweat glands are now functioning.
Human Fetusat 26 Weeks
Month 7
The baby now can use the four senses: vision, hearing, touch, and taste. He/she also recognizes her mother's voice and dreams.
Human Fetus at 28 Weeks 
Human Fetusat 30 Weeks
Month 8
The baby's skin begins to thicken as a layer of fat builds up underneath for nourishment and insulation. Antibodies in his/her body are increasingly building up. He/she absorbs about a gallon of amniotic fluid each day, which is completely replaced about every 3 hours.
Human Fetus at 34 WeeksMonth 9
Nearing the end of this month, the baby is ready for birth. By this time, the infant normally weighs between 6 and 9 pounds, and is fully capable of life outside the womb.
Newborn Baby Shortly After Birth
