Review the images and text about stages 13 (about 32 days) and 23 (about 53-58 days), and compare the limb development at these stages.
At stage 13, all four limb buds are present, and the upper limb buds resemble flippers. By stage 23, the upper limbs have well-formed arms, elbows, wrists, and fingers, while the lower limbs have well-formed feet, toes, and knees.
Which of the following did you include in your response?
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8 weeks12 weeks✔ 20 weeks24 weeks38 weeks Fetus begins movements called quickening.
8 weeks✔ 12 weeks20 weeks24 weeks38 weeksAt this point, the chance of a miscarriage decreases.
8 weeks12 weeks20 weeks24 weeks✔ 38 weeks The pregnancy is considered “at term” at this point.
✔ 8 weeks12 weeks20 weeks24 weeks38 weeks At this point, eyelids and ears are forming.
8 weeks12 weeks20 weeks✔ 24 weeks38 weeks At this point, lungs begin to produce surfactant.
How does an ultrasound produce an image of a fetus in the mother’s uterus?
An ultrasound sends high-frequency sound waves into the uterus. The waves reflect off the fetus and surrounding tissues, and a computer uses the returning echoes to create an image.
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