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Bellwork

Bellwork. What is the importance of the placenta? Creates a barrier between mother and baby to prevent mixing of blood Provides baby with oxygen and nutrients. Pregnancy & Labor. SWBAT list changes in the mother during pregnancy SWBAT describe the stages of labor

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Bellwork

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  1. Bellwork • What is the importance of the placenta? • Creates a barrier between mother and baby to prevent mixing of blood • Provides baby with oxygen and nutrients

  2. Pregnancy & Labor SWBAT list changes in the mother during pregnancy SWBAT describe the stages of labor SWBAT describe structure and function of the mammary glands

  3. Effects of Pregnancy on Mother • Enlargement of uterus

  4. Effects of Pregnancy on Mother • Curvature of lumbar

  5. Effects of Pregnancy on Mother • Relaxation of pelvis

  6. Effects of Pregnancy on Mother • Morning sickness from elevated progesterone

  7. Effects of Pregnancy on Mother • Heartburn • Constipation

  8. Effects of Pregnancy on Mother • Increased urination (kidneys working harder, bladder compressed) • Blood volume increase (25-40%)

  9. Childbirth • Labor: series of events to expel infant from uterus

  10. Initiation of Labor • Combination of hormones produce uterine contractions: • Estrogen levels rise • Placenta releases prostaglandins • Pituitary gland releases oxytocin

  11. Remember positive feedback?

  12. 6-12 hours! Stages of Labor • Dilation • Cervix becomes dilated • Uterine contractions begin and increase • Amnion ruptures

  13. ~50 minutes! Stages of Labor • Expulsion • Infant passes through cervix & vagina (normal is head first)

  14. Stages of Labor • Placental stage • Delivery of the placenta

  15. Other deliveries • Forceps • Vacuum • Cesarean section

  16. Mammary Glands • Modified sweat glands • Present in both sexes, only produce milk in females • Stimulated by: • Estrogen to grow • Oxytocin to lactate

  17. Mammary Glands • Areola: pigmented area • Nipple: center of areola • Alveolar glands: produce milk • Lactiferous ducts: connect alveolar glands to nipple

  18. In your packet… • Complete: • #20 • #26 • #27 part 1 • #30-33

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