1. pregnancy
Pregnancy lasts about 40 weeks, counting from the first day of your last normal period. The weeks are grouped into three trimesters

2. TRIMESTERS Trimester 1st = week’s 1-13 2nd = week’s 14 - 26
3rd = week’s 27 and on
(38-40 WEEKS)

3. Upset stomach with or without throwing up (morning sickness)
FIRST Trimester (Week 29-Week 40)
During the first trimester your body undergoes many changes. Hormonal changes affect almost every organ system in your body. These changes can trigger symptoms even in the very first weeks of pregnancy. Your period stopping is a clear sign that you are pregnant. Other changes may include:
Extreme tiredness
Upset stomach with or without throwing up (morning sickness)
Cravings or distaste for certain foods
Mood swings
Constipation (trouble having bowel movements)
Need to pass urine more often
Headache
Heartburn
Weight gain or loss

4. Second Trimester (Week 13-Week 28)
As your body changes to make room for your growing baby, you may have:
Body aches, such as back, abdomen, groin, or thigh pain
Stretch marks on your abdomen, breasts, thighs, or buttocks
Darkening of the skin around your nipples
A line on the skin running from belly button to pubic hairline
Patches of darker skin, usually over the cheeks, forehead, nose, or upper lip. Patches often match on both sides of the face. This is sometimes called the mask of pregnancy.
Numb or tingling hands, called carpal tunnel syndrome
Itching on the abdomen, palms, and soles of the feet. (Call your doctor if you have nausea, loss of appetite, vomiting, jaundice or fatigue combined with itching. These can be signs of a serious liver problem.)
Swelling of the ankles, fingers, and face.

5. Third Trimester (Week 29-Week 40)
Some new body changes you might notice in the third trimester include:
Shortness of breath
Heartburn
Swelling of the ankles, fingers, and face. (If you notice any sudden or extreme swelling or if you gain a lot of weight really quickly, call your doctor right away. This could be a sign of preeclampsia.)
Tender breasts, which may leak a watery pre-milk called colostrum (kuh-LOSS-struhm)
Your belly button may stick out
Trouble sleeping
The baby "dropping", or moving lower in your abdomen
Contractions, which can be a sign of real or false labor

6. 1 Month First Trimester At the end of four weeks:
Baby is 1/4 inch in length
Heart, digestive system, backbone and spinal cord begin to form
Placenta (sometimes called "afterbirth") begins to develop
The single fertilized egg is now 10,000 times larger than size at conception

7. Month 2 First Trimester At the end of 8 weeks:
Baby is 1-1/8 inches long
Heart is functioning
Eyes, nose, lips, tongue, ears and teeth are forming
Penis begins to appear in boys
Baby is moving, although the mother can not yet feel movement

8. Month 3 First Trimester At the end of 12 weeks:
Baby is 2 1/2 to 3 inches long
Weight is about 1/2 to 1 ounce
Baby develops recognizable form. Nails start to develop and earlobes are formed
Arms, hands, fingers, legs, feet and toes are fully formed
Eyes are almost fully developed
Baby has developed most of his/her organs and tissues
Baby's heart rate can be heard at 10 weeks with a special instrument called a Doppler

9. Month 4 Second Trimester At the end of 4 months:
Baby is 6 1/2 to 7 inches long
Weight is about 6 to 7 ounces
Baby is developing reflexes, such as sucking and swallowing and may begin sucking his/her thumb
Tooth buds are developing
Sweat glands are forming on palms and soles
Fingers and toes are well defined
Sex is identifiable
Skin is bright pink, transparent and covered with soft, downy hair
Although recognizably human in appearance, the baby would not be able to survive outside the mother's body

10. Month 5 Second Trimester At the end of 5 months:
Baby is 8 to 10 inches long
Weight is about 1 pound
Hair begins to grow on baby's head
Soft woolly hair called lanugo will cover its body. Some may remain until a week after birth, when it is shed.
Mother begins to feel fetal movement
Internal organs are maturing
Eyebrows, eyelids and eyelashes appear

11. Month 6 Second Trimester At the end of 6 months:
Baby is 11 to 14 inches long
Weight is about 1 3/4 to 2 pounds
Eyelids begin to part and eyes open sometimes for short periods of time
Skin is covered with protective coating called vernix
Baby is able to hiccup

12. Month 7 Third Trimester At the end of 7 months:
Baby is 14 to 16 inches long
Weight is about 2 1/2 to 3 1/2 pounds
Taste buds have developed
Fat layers are forming
Organs are maturing
Skin is still wrinkled and red
If born at this time, baby will be considered a premature baby and require special care

13. Month 8 Third Trimester At the end of 8 months:
Baby is 16 1/2 to 18 inches long
Weight is about 4 to 6 pounds
Overall growth is rapid this month
Tremendous brain growth occurs at this time
Most body organs are now developed with the exception of the lungs
Movements or "kicks" are strong enough to be visible from the outside
Kidneys are mature
Skin is less wrinkled
Fingernails now extend beyond fingertips

14. Month 9 Third Trimester At the end of 9 months:
Baby is 19 to 20 inches long
Weight is about 7 to 7 1/2 pounds
The lungs are mature
Baby is now fully developed and can survive outside the mother's body
Skin is pink and smooth
Baby settles down lower in the abdomen in preparation for birth and may seem less active

15. AMNIOTIC FLUID
Clear, yellowish fluid surrounding the developing fetus.
Protects Fetus
Controls Temperature
Supports Symmetrical Growth
Allows Movement

16. UMBILICAL CORD Connecting link between fetus and placenta.
Transports oxygen and nutrients to fetus from the placenta and returns waste products from the fetus to the placenta.
Contains: 2 arteries and 1 vein