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All ages referenced from date of fertilization, not last menstrual period.

Chris and Misty's Pregnancy Calendar

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April 18, 2008 – My baby is due!

20 in (50 cm)

Ready for Birth


—	Thighs are about three inches long (about 7Â½ cm).
—	The heart beats 54 million times before birth.
—	Time to be born!
—	Air breathing begins.
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April 11, 2008 – My baby is 37 weeks old. I am 39 weeks pregnant (since LMP).

20 in (50 cm)

Fetal Respiratory Rate


—	Breathing motions occur about 70% of the time.
—	Baby's foot is now about three inches long (about 7Â½ cm).
—	Baby sometimes drinks 450cc (or 15 oz) of amniotic fluid each day.
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April 04, 2008 – My baby is 36 weeks old. I am 38 weeks pregnant (since LMP).

19 in (49 cm)

Exposure to Loud Noise


—	The number of heartbeats since conception is now greater than 50 million!
—	The belly is finally as big around as the head.
—	The brain weighs about 300 grams (a little less than Â¾ pound).
—	Baby weighs about 3,000 grams (about 6 pounds, 10 ounces).
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March 28, 2008 – My baby is 35 weeks old. I am 37 weeks pregnant (since LMP).

19 in (48 cm)

Firm Hand Grasp


—	The baby has a firm hand grasp.
—	Amniotic fluid volume peaks.
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March 21, 2008 – My baby is 34 weeks old. I am 36 weeks pregnant (since LMP).

18 in (47 cm)

Flavor Preferences


—	Baby's feet are now 15 times their length at the age of 8 weeks.
—	Steady weight gain is a hallmark of the last weeks of pregnancy.
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March 14, 2008 – My baby is 33 weeks old. I am 35 weeks pregnant (since LMP).

18 in (46 cm)

Alveoli Formation


—	Baby weighs about 2,500 grams (about 5Â½ pounds).
—	What the baby hears during these last weeks of pregnancy, he or she may prefer later (e.g. Mom's voice).
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March 07, 2008 – My baby is 32 weeks old. I am 34 weeks pregnant (since LMP).

18 in (45 cm)

Rapid Brain Growth


—	The lifetime supply of the kidney's filtration units is now present.
—	The lungs produce "air pocket" cells from now until 8 years of age.
—	Prenatal food seems to affect newborn taste preferences.
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February 29, 2008 – My baby is 31 weeks old. I am 33 weeks pregnant (since LMP).

17 in (44 cm)

Behavioral States


—	The brain weighs about 200 grams (a little less than Â½ pound).
—	Baby now weighs around 2,000 grams (almost 4Â½ pounds)!
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February 22, 2008 – My baby is 30 weeks old. I am 32 weeks pregnant (since LMP).

17 in (42 cm)

Breathing Movements


—	Feet now measure almost 2Â½ inches long (about 6 cm).
—	Breathing motions are common, even though there is no air in the womb.
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February 15, 2008 – My baby is 29 weeks old. I am 31 weeks pregnant (since LMP).

16 in (41 cm)

Fetus Appears Less Wrinkled


—	After 40 million heartbeats, is a tuneup needed?
—	As fat stores increase, wrinkles disappear.
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February 08, 2008 – My baby is 28 weeks old. I am 30 weeks pregnant (since LMP).

16 in (40 cm)

Sound Discrimination


—	Breathing motions are getting deeper and taking longer.
—	Baby now weighs about 1,500 grams (about 3 pounds, 5 ounces).
—	Baby can distinguish sounds of different frequencies.
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February 01, 2008 – My baby is 27 weeks old. I am 29 weeks pregnant (since LMP).

15 in (38 cm)

Response to Light


—	The head is about the size of a softball.
—	Pupils react to lightâ€”just like newborns and big kids.
—	Body weight typically more than doubles from now until the end of pregnancy.
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January 25, 2008 – My baby is 26 weeks old. I am 28 weeks pregnant (since LMP).

15 in (37 cm)

Sense of Smell


—	The sense of smell has arrived.
—	The fetus can taste.
—	Between now and birth, brain weight increases 400% to 500%.
—	The eyes can produce tears.
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January 18, 2008 – My baby is 25 weeks old. I am 27 weeks pregnant (since LMP).

14 in (36 cm)

Somersaults


—	The thigh bone (femur) is about two inches long (about 5 cm).
—	Baby now weighs about 1,000 grams (about 2 pounds, 3 ounces).
—	Baby's foot is now about two inches long (about 5 cm).
—	The eyes can detect low light and see in color.
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January 11, 2008 – My baby is 24 weeks old. I am 26 weeks pregnant (since LMP).

14 in (35 cm)

Fetal Respiratory Rate


—	Sometimes breathing motions occur up to 44 times per minute.
—	Sudden, loud noises trigger a blink-startle response.
—	The lungs produce a substance vital for breathing after birth.
—	Loud noise increases movement, heart rate, and swallowing.
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January 04, 2008 – My baby is 23 weeks old. I am 25 weeks pregnant (since LMP).

13 in (33 cm)

Blink-Startle Response


—	The brain weighs about 100 grams (a little less than Â¼ of a pound).
—	Breathing motions are seen about 14% of the time now and for the next weeks.
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December 28, 2007 – My baby is 22 weeks old. I am 24 weeks pregnant (since LMP).

12 in (31 cm)

Age of Viability


—	Heart beat count now exceeds 30 million beats!
—	The two sides of the brain are no longer symmetrical.
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December 21, 2007 – My baby is 21 weeks old. I am 23 weeks pregnant (since LMP).

12 in (30 cm)

Skin and Hair


—	Baby now weighs around 500 grams (about 1 pound, 2 ounces).
—	Rapid eye movement occurs, just like adults when they dream.
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December 14, 2007 – My baby is 20 weeks old. I am 22 weeks pregnant (since LMP).

11 in (28 cm)

Responds to Sound


—	The head is now the size of a tennis ball.
—	The inner ear is already fully developed and fully grown.
—	If born prematurely this week, the chance of survival is about 40% with expert medical care!
—	Hearing begins, as does response to sound.
—	All skin layers and structures are complete.
—	The eyelids separate, and eyes open and close.
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December 07, 2007 – My baby is 19 weeks old. I am 21 weeks pregnant (since LMP).

11 in (27 cm)

Circadian Rhythms


—	Girlsâ€™ ovaries now contain their lifetime supply of â€œeggs.â€
—	Melanin begins forming and helps create an attractive skin tone.
—	Movement, breathing, and heart rate begin following daily rhythms.
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November 30, 2007 – My baby is 18 weeks old. I am 20 weeks pregnant (since LMP).

10 in (26 cm)

Vernix Caseosa


—	Sweat glands have arrived.
—	Certain movements in the larynx (voice box) are similar to that seen when talking after birth.
—	A greasy white substance protects the skin from the amniotic fluid.
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November 23, 2007 – My baby is 17 weeks old. I am 19 weeks pregnant (since LMP).

9 in (23 cm)

Bronchial Tree


—	The baby's heart has now beat has more than 20 million times!
—	The head is about as big around as the average woman's wrist.
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November 16, 2007 – My baby is 16 weeks old. I am 18 weeks pregnant (since LMP).

8.3 in (21 cm)

Hormonal Stress Response


—	Enamel begins forming on the developing teeth.
—	All air passages within the lungs are well formed.
—	The thigh bones (femur) are now about an inch long (or 2Â½ cm).
—	The baby releases stress hormones if poked with a needle.
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November 09, 2007 – My baby is 15 weeks old. I am 17 weeks pregnant (since LMP).

7.7 in (20 cm)

Blood Cells and Bone Marrow


—	Nutrients in the amniotic fluid are broken down by digestive enzymes.
—	Blood cells begin replicating inside the bone marrowâ€”just like big kids!
—	The head is bigger than a golf ballâ€”and much cuter!
—	Baby's foot is now about one inch long (about 2Â½ cm).
—	Body fat emerges throughout the body.
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November 02, 2007 – My baby is 14 weeks old. I am 16 weeks pregnant (since LMP).

6.7 in (17 cm)

Quickening


—	Starting at this age, girl fetuses move their jaws more often than the boys.
—	A pregnant mom may feel kicking for the first time.
—	If touched near the mouth, the face turns toward the side touched.
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October 26, 2007 – My baby is 13 weeks old. I am 15 weeks pregnant (since LMP).

6 in (15 cm)

Responds to Touch


—	The baby is making more hormones all the time.
—	The entire fetus (except for parts of the scalp) responds to light touch.
—	Teeth are growing.
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October 19, 2007 – My baby is 12 weeks old. I am 14 weeks pregnant (since LMP).

4.7 in (12 cm)

Taste Buds


—	Weight increased by 60% this past week.
—	There are taste buds all over the mouth.
—	Hands touch the mouth as many as 50 times per hour.
—	Arms reach their final proportion to body size.
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October 12, 2007 – My baby is 11 weeks old. I am 13 weeks pregnant (since LMP).

3.7 in (10 cm)

Nose and Lips


—	The face now makes complex expressions.
—	If you could peek inside, you could tell if it's a girl or boy!
—	Intestines absorb water and glucose from swallowed amniotic fluid.
—	The nose and lips are completely formed.
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October 05, 2007 – My baby is 10 weeks old. I am 12 weeks pregnant (since LMP).

3 in (8 cm)

Eyes Roll, Yawns


—	Body weight increased more than 75% just this week!
—	Bones are hardening throughout the body.
—	Fingernails and toenails begin to grow!
—	The right and left sides of the brain are connecting.
—	Tiny folds in the skin form unique fingerprints.
—	The eyes roll downward after stimulation of the upper lid.
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September 28, 2007 – My baby is 9 weeks old. I am 11 weeks pregnant (since LMP).

2.4 in (6 cm)

Sucking and Swallowing


—	The mouth opens and closes, and the tongue moves.
—	The eyelids are now fused.
—	Swallowing amniotic fluid begins.
—	The fetus sighs, stretches, and moves the head.
—	Female fetuses have early reproductive cells in their ovaries.
—	Thumb sucking begins.
—	Grasping objects begins.
—	Yawning begins. (9 wks, 4 days)
—	Vocal cords are developing. (9 wks, 4 days)
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September 21, 2007 – My baby is 8 weeks old. I am 10 weeks pregnant (since LMP).

1.2 in (3 cm)

Spontaneous Movement


—	Occasional breathing motions begin.
—	The skin thickens and loses transparency.
—	Some embryos are right-handed, some are left-handed.
—	Male embryos are already making testosterone!
—	The embryo floats and rolls over in the womb.
—	The embryo's joints are similar to adult joints.
—	The embryo has more than 4,000 body parts (adults have about 4,500).
—	The embryonic period is ending. Tomorrow the fetal period begins.
—	Hair is starting to grow on the brow and around the mouth.
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September 14, 2007 – My baby is 7 weeks old. I am 9 weeks pregnant (since LMP).

0.8 in (2 cm)

Fingers and Toes


—	The heart is nearly complete.
—	Girls now have ovaries and boys have testes.
—	The head sometimes turns.
—	Fingers and toes emerge.
—	Hiccups may occur from now on.
—	The hands touch each other, as do the feet! (7 wks, 4 days)
—	Knee joints have arrived. (7 wks, 4 days)
—	The fingers are free. (7 wks, 4 days)
—	The toes are free. (7 wks, 6 days)
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September 07, 2007 – My baby is 6 weeks old. I am 8 weeks pregnant (since LMP).

0.5 in (1 cm)

Hand Movement


—	The face withdraws if lightly touched around the mouth.
—	The diaghragm is largely formed.
—	Electrical connections are forming in the spine.
—	The external ear is taking shape.
—	The appendix can be seen.
—	Brainwave activity is reported. (6 wks, 2 days)
—	Collar bones and jaw bones begin to harden. (6 wks, 4 days)
—	The hands begin to move. (6 wks, 4 days)
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August 31, 2007 – My baby is 5 weeks old. I am 7 weeks pregnant (since LMP).

9 mm

Hand Plates and Cartilage


—	The head makes up one third of the whole embryo!
—	The permanent kidneys are in place.
—	Hand plates have arrived.
—	Lung regions reflect the pattern of adult lungs.
—	Joints in the wrists are forming. (5 wks, 1 day)
—	Foot plates are present. (5 wks, 2 days)
—	Subtle movement begins. (5 wks, 5 days)
—	The heart's four chambers are seen in action. (5 wks, 6 days)
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August 24, 2007 – My baby is 4 weeks old. I am 6 weeks pregnant (since LMP).

5 mm

The Heart in Action


—	The amnion surrounds the embryo with a fluid-filled sac.
—	The umbilical cord is in place.
—	A tiny trachea or windpipe is forming.
—	The heart beats more than 100 times per minute.
—	Limb buds (soon-to-be arms and legs) appear.
—	Part of the brain that will control coordination is present.
—	The skin is so thin, you can see through it!
—	The brain's five main sections are visible. (4 wks, 4 days)
—	Cerebral hemispheres appear and begin to grow rapidly. (4 wks, 4 days)
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August 17, 2007 – My baby is 3 weeks old. I am 5 weeks pregnant (since LMP).

3 mm

The Folding of the Embryo


—	The brain has three major divisions.
—	Blood cells and blood vessels are forming.
—	The heart is shaped like a long tube.
—	The heart begins beating! (3 wks, 1 day)
—	Part of the thyroid gland appears. (3 wks, 1 day)
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August 10, 2007 – My baby is 2 weeks old. I am 4 weeks pregnant (since LMP).

0.2 mm

Amnion and Germ Layers


—	germ cells, which will form eggs in girls and sperm in boys, are present.
—	Blood cell precursors are appearing in the yolk sac.
—	The early heart can be seen. (20 days)
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August 03, 2007 – My baby is 1 week old. I am 3 weeks pregnant (since LMP).

0.1 mm

The Morula and Blastocyst


—	The hormone hCG triggers a positive pregnancy test. (8 days)
—	Cells in the womb near the embryo are loaded with nutrients.
—	The amniotic sac begins forming. (10 days)
—	Implantation is complete and the placenta is starting to form. (12 days)
—	The embryo is now symmetrical about the midline. (13 days)
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July 27, 2007 – Fertilization (conception) occurs. I am 2 weeks pregnant (since LMP).

0.1 mm

Cell Division


—	Development begins with a single-cell embryo at conception!!! (Age: 0-1 day old)
—	One cell becomes two. (30 to 36 hours old)
—	With 12 to 16 cells, the embryo is shaped like a tiny bunch of grapes. (3 days old)
—	The site of the future back and chest can be seen. (4 days old)
—	The embryo begins to implant in the womb. (6 days)
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