conception and fertilization require - CORRECT ANSWERS ✔✔favorable pH and
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cervical mucus |\
embryonic stage - CORRECT ANSWERS ✔✔most critical time in development of
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organs and external features (day 15-8 weeks after conception)
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at the end of 8 weeks - CORRECT ANSWERS ✔✔- all organ systems are present
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- baby is most vulnerable to teratogens during this time
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all women of childbearing age should be taking - CORRECT ANSWERS ✔✔folic
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acid
placenta - CORRECT ANSWERS ✔✔- protects fetus from immune attack by the
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mother
- induces mother to bring more food to placenta
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- near time of delivery produces hormones that ready fetal organs for life outside
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uterus
hCG (human chorionic gonadotropin) - CORRECT ANSWERS ✔✔- preserves
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corpus luteum and its progesterone production so endometrial lining is
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maintained
- basis for pregnancy test
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,hPL (human placental lactogen) or hCS (human chorionic somatomammotropin)
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- CORRECT ANSWERS ✔✔- modulates fetal and maternal metabolism and
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development of maternal breasts for lactation |\ |\ |\ |\ |\
- decreases maternal glucose use to increase availability to fetus
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estrogen (estriol) - CORRECT ANSWERS ✔✔- enlargement of breasts, uterus,
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external genitalia |\
- stimulates myometrial contracility
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progesterone (progestin) - CORRECT ANSWERS ✔✔- maintains endometrium
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- decreases contractility of uterus
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- stimulates breast development
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- provides nourishment for early conceptus
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relaxin - CORRECT ANSWERS ✔✔- causes relaxation of pelvic ligaments
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- softens cervix in preparation for birth
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umbilical cord arteries - CORRECT ANSWERS ✔✔carry deoxygenated blood
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away from fetus to the placenta
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umbilical cord vein - CORRECT ANSWERS ✔✔carries oxygenated blood from
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placenta to fetus |\ |\
, wharton jelly - CORRECT ANSWERS ✔✔specialized connective tissue that
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surrounds the three blood vessels to prevent compression
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amnion - CORRECT ANSWERS ✔✔covers the umbilical cord and fuses with the
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chorion on fetal side of placenta
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chorion - CORRECT ANSWERS ✔✔- chorionic villi burrow into decidua and
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become placenta |\
- "c" for caring = maternal body
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amniotic fluid - CORRECT ANSWERS ✔✔- surrounds embryo and increases in
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volume as pregnancy progresses
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- reaches about 1 L at term
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- derived from fluid transported from maternal blood across the amnion (98%
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water, 2% organic matter)
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amniotic fluid functions - CORRECT ANSWERS ✔✔- thermoregulation
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- oral fluid
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- cushion from trauma
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- freedom of movement for musculoskeletal development
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- fetal lung development
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amniotic fluid contains - CORRECT ANSWERS ✔✔- albumin
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- urea
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- uric acid
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