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What happens in the first month of fetal development?
By the end of the 1st month the embryo is about 1/10 of an inch long. The heart is no larger than a poppy seed and has begun beating.
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Which month of fetal development is the embryo 1 inch long, has slightly webbed fingers, veins are clearly visible and the heart has divded into right and left chambers?
Second month
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What happnes in the 3rd month of fetal development
Fetus is 2 1/2 to 3 inches long, is fully formed. Has begun swallowing and kicking. All organs and muscles have formed and are beginning to function.
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what happens in the fourth month of fetal development
baby is covered in a layer of thick downy hair called lanugo, heartbeat can be heard clearly. feel the baby's first kick
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Which month of fetal development is there a protective coating called a vernix caseosa forming on the baby's skin, the baby will be 8 inches long and weigh almost a pound
Five months
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What happens in the sixth month of fetal development
eyebrows and eyelids are visible. The baby's lungs are filled with amniotic fluid, and the baby has started breathing. He can hear you talk and sing
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what happens in the seventh month of fetal development
baby weighs about 3 1/2 lbs and is about 12 inches long. body is well-formed, fingernails cover fingertips
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Which month of fetal development is the baby gaining about half a pound per week and layers of fat are piling on. Baby has turned head-down for birth and weighs b/t 4 and 6 lbs
Eight months
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what happens in fetal development at nine months
baby is 6-9 lbs and is b/t 19-22 inches, may move around less as he becomes more crowded.
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How much amniotic fluid is present at term
800-1200 mL
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When is the baby's sex recognizable?
12 weeks
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when do the nose and ears ossify
20 weeks
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What happens by the end of the first trimester (13 weeks)
Every organ has begun to form including genitalia
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When do the primary lung and urethral buds appear
At 6 weeks
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When do the vernix caseosa and lanugo appear.
20 weeks
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When does the heart begin to pump blood
by the 3rd week
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when can the heart beat be heard with ultrasound
by the 8th week
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What does the placenta do?
It produces hormones essential to maintain the pregnancy, supplies the O2 and nutrients needed by the developing baby for survival and growth and removes wastes and CO2.
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What is an embryo
the term that refers to the developing baby from day 15 until 8 weeks after conception
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what is the term fetus?
refers to the developing baby from 9 weeks gestation to the end of the pregnancy.
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What are dizygotic twins
Faternal twins, twins that are formed from 2 zygotes
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what are monozygotic twins
identical twins, formed from one fertilized ovum that then divide.
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