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Fertilization by egg and sperm
When an egg is released, it moves into the fallopian tube.
The egg stays there for about 24 hours, waiting for a single sperm to fertilize it.
All this happens 2 weeks after your last period. -
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Implantation of Fertilized Egg
It takes 6 to 10 days for implantation to occur after fertilization of the egg while the fertilized egg is dividing into different cells and finding a place to attach itself in the lining of the mother's uterus. A blastocyst will become the embryo. The embryo is what will develop into your baby.
The outer group of cells will become structures, called membranes, which nourish and protect the embryo. -
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Week 4
Ball of cells has officially become an embryo
About the size of a poppy seed
Over the next 6 weeks, all of your baby's organs will begin to develop -
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Week 5
The baby's heart begins to beat – at 2 times the rate of yours.
Baby's "body" is only the size of a flower seed. -
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Week 6
Facial features are beginning to form
Little buds appear where arms and legs will develop. -
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Week 8
Arms and legs are growing
Baby now has little fingers, as well as a nose and upper lip.
He's moving quite a bit now, but you won't feel it.
The baby is mostly developed, is an inch long and weighs less than a 1/3 of ounce -
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Week 9
Eyes have developed
Although your baby's eyelids are fused shut for now.
Lost her "tail"
Starting to look more human -
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Week 10
Embryo has become a fetus.
The vital organs are starting to function.
Tiny fingernails and toenails are starting to form. -
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Week 11
Baby is almost fully formed
Bones are beginning to harden
Genitalia are developing
She can hiccup, though it's too soon for you to feel it. -
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Week 12
Baby's heartbeat can be heard at a prenatal checkup.
Baby's just over 2 inches long and weighs about 1/2 an ounce. -
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Week 14
The kidneys are producing urine and the baby releases it into the amniotic fluid. Facial expressions can be made
Baby may have discovered thumb-sucking -
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Week 15
Baby can see light that filters in from outside your womb
The baby can hear sounds from outside the womb too -
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Week 18
You probably will feel the baby move in the next few weeks. For other people it'll take a couple of weeks longer. The doctors can now make out the gender of the baby with an ultrasound. -
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Week 19
Baby can hear your heartbeat and sounds that come from outside your body.
Skin is wrinkly and is covered by a protective, waxy coating.
She measures about 6 inches and weighs about 8 1/2 ounces. -
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Week 23
Baby's sense of movement has developed
Can feel the motion if you dance.
Sense of hearing keeps improving
May sometimes be able to see him squirming under the surface of your belly. -
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Week 24
The baby's taste buds are developing.
Brain is growing very quickly
Hair may be growing as well
Almost a foot long and weighs just over 1 pound. -
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Week 27
The lungs are developing
but won't be fully functional for some number of weeks. Is preparing for life on the outside by
inhaling and exhaling amniotic fluid
sleeping and waking up at regular intervals,
opening and closing his eyes
and sucking his fingers. -
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Week 28
Baby may be dreaming
Now has eyelashes
Eyesight is improving.
Billions of neurons are developing in her brain.
Weighs about 2 1/4 pounds and about 15 inches long -
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Week 32
Now has cute little fingernails and toenails
Baby is also starting to plump up in preparation for birth.
Almost 17 inches long and weighs about 3 3/4 pounds. -
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Week 34
Lungs and central nervous system are continuing to develop.
Skin has become soft and smooth
The baby's getting even rounder and bigger
Almost 18 inches long and weighs about 4 3/4 pounds. -
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Week 37
Baby is now considered "early term."
Babies born in "early term" usually do well
But some stay in the womb for a couple more weeks to give the brain and lungs time to fully mature -
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Week 39
Baby is now ready for life outside the womb(aka full term)
Average weight of a newborn=about 7 1/2 pounds
Average length=about 20 inches. -
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Week 41
If and only if the baby is passed the due date and is now considered "late term."
Baby's health may be monitored with tests such as a biophysical profile.
To avoid complications, the doctor will probably talk to the mother about inducing labor in the next week or two. -
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Citations
"Conception & Pregnancy: Ovulation, Fertilization, and More." WebMD. WebMD, n.d. Web. 01 Dec. 2016.
"How Long Does It Take a Fertilized Egg to Implant?" Reference. N.p., n.d. Web. 01 Dec. 2016.
"Fetal Development Timeline | BabyCenter." BabyCenter. N.p., 01 Dec. 2016. Web. 02 Dec. 2016.