2 Weeks - Conception (fertilization)
The egg and sperm unite and form a single living cell, a new human being. This cell is smaller than a grain of salt, yet it contains detailed genetic information like the color of hair and eyes he/she will have, the unique, one-of-a-kind fingerprint, the physical appearance, skin tone and so much more.
The heart, which is the size of a poppy seed, begins to beat. The brain and every organ system is developing.
All four chanbers of the heart are present and pumping the embryo’s own blood to his or her brain and body. The head, as well as the chest and abdominal cavities have formed. The beginnings of the arms and legs are easily seen.
The baby has made dramatic progress in growth. He or she is about 2/3 inch long from head to bottom.Brain waves have been measured and recorded before 8 1/2 weeks of pregnancy. The testicles or ovaries are beginning to form. Lungs are developing and eyelids are beginning to form.The baby moves reflexively.
Breathing motions begin. Kidneys begin to produce and release urine.Several hundred muscles are present. The hands and feet move frequently and the first signs of right, or left-handedness can be observed.
The baby is now 2 inches long and can yawn and suck. The intestines are developing. If the baby is a boy, he begins to produce the male hormone, testosterone. During the next several weeks he or she will grow rapidly.
The baby measures about 3 inches from head to heel.Fingerprints start forming while fingernails and toenails begin to grow. The bones are hardening in many locations.
The lips and nose are fully formed.The baby can make complex facial expressions.
Measures slightly less than 5 inches from head to heel. Taste buds are present. Arms reach final proportion to body size.
The entire unborn baby responds to light touch, except for parts of the scalp. Teeth are developing within the jawbones. The mother may begin to feel fetal movement.
The heart beats between 120 – 180 times per minute and pumps about 25 quarts of blood each day. If she is a girl, millions of eggs are forming in her ovaries. The baby is almost 7 inches head to heel now.Unborn baby girls move their jaws more often than boys.
The pregnancy is about halfway throughThe mother is usually "showing" at this point.The baby has his or her own waking and sleeping patterns and even its own favorite position to sleep in.
The baby can recognize his mother’s voice.The baby may have a blink-startle response to sudden sound near the mother’s abdomen. The baby will inhale amniotic fluid preparing for breathing.
The baby is now about 15 inches and weighs about 2 1/2 pounds. He or she will continue to gain weight, and the skin becomes less wrinkled and smoother. Eyelashes and eyebrows are well-formed and the hair on the head is growing longer.
The baby now has a plump body and a firm grasp. He or she is around 20 inches long and weighs about 7 to 8 pounds. The baby is ready to be born! Only 4% of babies are born on their due date.
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