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Conception
Sperm fertilizes egg -
Period: to
Period of the Zygote
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Period: to
First Trimester
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Period: to
Period of the Embryo
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1 month
Embryo is the size of a pin head, heart the size of a poppy seed has begun beating, egg has attached itself to the lining of the uterus. Mother only missed a period, no other noticable signs. -
2 months
Embryo is 1 inch long, has face eyes ears and limbs, veins are visible, and heart has divided into left and rigt chanmbers -
Period: to
Period of the Fetus
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3rd Month
Fetus is a little over 2 inches long, fully formed, began swallowing and kicking, all organs and muscles are formed. Mother: breasts firmer and fuller, abdomen is slightly larger, weight gain of 2-4 pounds -
Period: to
Second Trimester
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4 months
long hair covering baby's body lanugo, heartbeat can be heard clearly, baby is 3 inches long. Mother: appetite increases, morning sickness gone, abdomen continues to grow -
5 months
vernix caseosa forms on baby's skin, baby is about 6 1/2- 7 inches long -
6 months
eyebrows and eyelids visible, started breathing motions, baby can hear mother, 8-10 inches long
Mother: strong kicks and thumps felt, 10-12 lbs. of weight gain -
Period: to
Third Trimester
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7 months
fingernails cover finger tips, 10-12 inches long, 1 1/2 - 2 lbs.
Mother: posture is affected by increasing weight gain -
8 months
fetus gaining 1/2 lb. per week, turned head down, 2 1/2 - 3 lbs. 14-16 inches long.
Mother: discomfort, shortness of breath, backache, total weight gain of 18-20 lbs. -
Birth
After nine months the baby is born -
9 months
baby is crowded so moves less, 17-18 inches long, and weighs 5-6 lbs at beginning of month.
Mother: discomfort, "lightening" feeling as fetus drops and releases pressure, false labor pains
