Term
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Definition
| beginning development of GI tract |
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Term
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Definition
| heart is developing; beats at 28 days |
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Term
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Definition
| Somites develop - beginning vertebrae |
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Term
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Definition
| eyes and nose begin to form |
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Term
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Definition
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- Arm and leg buds are present |
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Term
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Definition
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Term
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Definition
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- Anterior portion of neural tube closes to form the brain |
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Term
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Definition
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- Rarely see an embryo on u/s at this phase |
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Term
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Definition
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Term
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Definition
| embryo has a marked c-shaped body and rudimentary tail |
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Term
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Definition
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Term
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Definition
oral and nasal cavities and upper lip |
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Term
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Definition
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Term
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Definition
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- Yolk sac no longer produces rbcs
o Liver produces blood cells |
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Term
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Definition
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Term
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Definition
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Term
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Definition
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Term
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Definition
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Term
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Definition
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- Spine and skull has closed |
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Term
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Definition
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- At end of this week becomes fetus; no longer embryo |
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Term
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Definition
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o All major structures are there to develop organs
§ Ex. brain not fully formed, but structure is there |
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Term
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Definition
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Term
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Definition
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Term
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Definition
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Term
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Definition
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Term
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Definition
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Term
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Definition
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- Fetal heart tones can be heard |
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Term
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Definition
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- Genitals are differentiated |
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Term
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Definition
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Term
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Definition
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- Insulin and thyroid hormone is produced |
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Term
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Definition
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- Miniature bones are outlined |
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Term
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Definition
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- Lungs acquire definitive shape |
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Term
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Definition
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Term
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Definition
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- Blood vessels are clearly developed |
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Term
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Definition
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- Active movements are present – some women may feel this
Feel through nervous tissue on abdomen; placenta doesn’t have nerves |
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Term
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Definition
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- Fetus makes sucking and swallowing motions |
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Term
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Definition
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- Produces meconium
o Can test when baby is born to see if there has been substance abuse |
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Term
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Definition
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- Subcutaneous brown fat appears |
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Term
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Definition
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- Quickening is felt by mother
o Moves almost continually now and for another 8 weeks
o This is usually when mother psychologically shifts focus from her to baby |
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Term
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Definition
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- Nipples appear over mammary glands |
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Term
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Definition
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- Fetal heartbeat is heard by fetoscope (special stethoscope, not a Doppler) |
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Term
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Definition
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435 to 465 g and measures about 19 cm |
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Term
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Definition
| eyes are structurally complete |
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Term
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Definition
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- Vernix caseosa covers skin |
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Term
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Definition
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- Alveoli are beginning to form in lungs
o Lower limit of viability: 23.5 weeks and 500 g
Before this vessels in lungs are too far apart for gas exchange with alveoli |
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Term
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Definition
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- Average weight: 1lb. 10 oz |
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Term
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Definition
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o Begins to make breathing movements in utero |
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Term
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Definition
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- Testes begin to descend |
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Term
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Definition
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- Lungs are structurally mature |
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Term
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Definition
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- From here to term Brain growth is rapid, |
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Term
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Definition
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some ability to regulate body functions |
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Term
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Definition
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- Rhythmic breathing movements |
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Term
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Definition
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- Ability to partially control temperature |
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Term
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Definition
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Bones are fully developed but soft and flexible |
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Term
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Definition
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fetal brain weighs 65% of what the term fetal brain weighs |
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Term
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Definition
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- Increase in subcutaneous fat |
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Term
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Definition
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- Lanugo begins to disappear |
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Term
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Definition
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- IgG crosses the placenta from 34 weeks on providing passive immunity for the newborn for the first 4-8 months; 4-8 weeks for some bacteria |
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Term
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Definition
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Term
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Definition
| gaining 1/3-1/2 lb per week |
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