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Period: to
Pregnancy and Prenatal Development
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Month One - Mom
Missed menstrual period -
Month One - Baby
Size: pin head
Egg attaches to lining of uterus
Critical stage for brain and spinal cord development
Internal organs and circulatory system begin to form
Heart begins to beat -
Month Two - Mom
Breasts begin to swell
Pressure on bladder from enlarging uterus
Possible nausea ("morning sickness")
Fatigue -
Month Two - Baby
Size: 1/4 inch
Face, eyes, ears, and limbs take shape
Bones begin to form -
Month Three - Mom
Breasts become firmer and fuller, may ache
Nausea, fitigue, and frequent urination may continue
Abdominal becomes slightly larger
Uterus is about the size if an orange
Weight gain may total 2-4 npounds -
Month Three - Baby
Size: 1 inch
Nostrils, mouth, lips, teeth buds, and eyelids form
Fingers and toes almost complete
All organs present, although immature -
Month Four - Mom
Abdomen continues to grow slowly
Most discomforts of early pregnancy, such as morning sickness, usually gone.
Appetite increases -
Month Four - Baby
Size: 3 inches, 1 ounce
Can suck thumb, swallow, hiccup and move around
Facial features become clearer -
Month Five - Mom
Enlarged abdomen becomes apparent
Slight fetal movements felt
Increased sixe may begin to affect posture -
Month Five - Baby
Size: 6-7 inches, 4-5 ounces
Hair, eyelashes, and eyebrows appear
Teeth continue to develop
Organs are maturing
Becomes more active -
Month Six - Mom
Fetal movements sensed as strong kicks, thumps, and bumps. Some may be visible.
Weight gain total 10-12 pounds -
Month Six - Baby
Size: 8-10 inches, 8-12 ounces
Fat deposits under skin, but fetus appears wrinkled
Breathing movements begin -
Month Seven - Mom
Increased size may affect posture -
Month Seven - Baby
Size: 10-12 inches, 1-2 pounds
Periods of activity followed by periods of rest and quiet -
Month Eight - Mom
Discomfot ma result from increased size
Backache, leg cramps, shortness of breath, and fatigue
Weight gain total 18-20 pounds -
Month Eight - Baby
Size: 14-16 inches, 2-3 pounds
Weught gain contiues rapidly
May react to loud noises with a reflex jerking action
Moves into a head-down position -
Month Nine - Mom
"Lightening" felt as the fetus drops into the pelvis
Breathing becomes easier
Other discomforts may continue
Weight gain total 25-35 pounds
False labor may be experienced -
Month Nine - Baby
Size: 17-18 inches, 5-6 pounds
Weight gain continues until the week before birth
Skin becomes smooth as fat deposits continue
Movements decrease as the fetus has less room to move around
Acquires disease-fighting antibodies from thee mother's blood
Descends into pelvis, ready for birth