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- The size of a pin head.
 - Critical stage for brain and spinal cord Development.
 - Internal organs and circlatiory system begin to form.
 -    The heart begans to beat.
 
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- Size: About 1inches (6mm)long as month begins.
 - Face, eyes, ears, and limbs take shape.
 - Bones begin to form.
 
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- Size: About 1inch (25mm) long as month begins.
 - Nostrils, mouth, lips, teeth buds, and eyelids form.
 - Fingers and toes almost complete.
 - All organs presents, although immature.
 
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- Can suck its thumb, swalllow, hiccup, and move around.
 - Facil features becomes clearer.
 
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- Hair, eyelases,and eyebrows, appear.
 - Teeth contiue to develop.
 - Organs are maturing.
 - Becomes more active.
 
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- Fat deposits under skin, but fetus appears wrinkled.
 - Breathing movements begins.
 
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-  About 14- 16 inches (25-31) long, about 1  1/2-2 pounds 
(680-907g) as months begins. - Periods of activity followed by periods of rest and quiet.
 
 -  About 14- 16 inches (25-31) long, about 1  1/2-2 pounds 
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- Weight gain countiues to rapidly.
 - May react to loud noises with a reflex jerking action.
 - Moves into head-down postion.
 
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- Weight gain countiues until the week before birth.
 - Skin becomes smooth as fat deposits countiue.
 - Movements decrease as the fetus has less room to move around
 - Descends into pelivs, ready for birth.
 
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- Missed menstrual period.
 - Other signs of pregnancy may not yet be noticeable.
 
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- Breasts on bladder from enlarging uterus result in need to urinate more frequently.
 - Possible nausea (''Morning sickness'').
 - Fatigue is common.
 
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- Breasts becomes firmer and fuller, may ache.
 - Nausea fatigue, and frequent urination may continue.
 - Abdomen becomes slightly larger. The uterus is about the size of a orange.
 - Weight gain may total 2-4 pounds (0.9-1.8kg).
 
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- Enlarged abdomen becomes apparent.
 - Sightly fetus movements felt.
 - Increases size may begin to affect posture.
 
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- Abdomen continues to grow slowly.
 - Most discomforts of early pregnancy, such as morning sickness, usually gone.
 - Appetite increases.
 
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- Fetus movements sensed as strong kicks, thump, and bumps. * Some may invisible.
 - Weights gain by the beginning of his month may total 10-12 pounds (4.5-5.4kg).
 
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- Increases size may affect posture.
 
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- Discomfort may result from increases size. Backache, leg cramps, shortness of breath,and fatigue are common.
 - Fetal kicks may disturb the mother's rest. *At the beginning of the month, weight gain totals about 18-20 pounds (8.2-9.1kg).
 
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- ''Lighting'' felt as the fetus drops into pelvis. Breathing becomes easier
 - Other discomforts may continue
 - A total weight gain of 25-35 pounds (11.3-15.9kg) is typical
 - False labor pains may be experienced.