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Chapter 3 Prenatal Development, Birth, and the Newborn Baby
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Learning Outcomes Three periods of prenatal development and milestones
Define teratogens and understand influence Impact of maternal factors on prenatal development Discuss medical complications Identify Common medical interventions during childbirth Describe use of APGAR Describe newborn baby’s reflexes Describe ways to sooth a crying baby Describe changes in a family after the birth
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Periods of Prenatal Development
Period and Length Key Events Zygote (2 weeks) Fertilization Implantation Start of placenta Embryo (6 weeks) Groundwork laid for all body structures and internal organs Fetus (30 weeks) “Growth and finishing” phase
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Conception and Implantation
Figure 3.1 Female reproductive organs, showing fertilization, early cell duplication, and implantation. Figure 3.1 (From Before We Are Born, 6th ed., by K.L. Moore & T.V.N. Persaud, p. 87. Copyright © 2003, reprinted with permission from Elsevier, Inc.)
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Ovulation Video
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Sensitive Periods in Prenatal Development
Figure 3.2 Sensitive periods in prenatal development Figure 3.2 (Adapted from Before We Are Born, 7th ed., by K.L. Moore & T.V.N. Persaud, p Copyright © 2008, reprinted with permission from Elsevier, Inc.)
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Teratogens Harm done by teratogens is affected by: dose heredity age
other negative influences Websites 7
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What period is the most sensitive?
Zygote Period Embryotic Period Fetal Period
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Teratogenic Substances
Drugs: prescription nonprescription illegal Tobacco Alcohol Radiation Environmental pollution Infectious disease © Minerva Studio/Fotolia
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Jigsaw Activity Index cards with substance will be passed out to assign you into a random group You will look up the drug impact in book, research from reliable sources on site (e.g., educational institutions). Cite when using outside of book How prevalent is it? How does it harm fetus? Can you find the category level? What is the impact after birth?
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Other Maternal Factors in
Prenatal Development Nutrition Emotional stress Rh factor incompatibility (p.73) Age Lack of prenatal health care © Dmitry Melnikov/Shutterstock
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Infant Mortality in Thirty Nations
Figure 3.5 Infant mortality in thirty nations Figure 3.5 (Adapted from U.S. Census Bureau, 2012.)
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Importance of Prenatal Care
Monitor general health: weight gain capacity of uterus and cervix to support fetus growth of the fetus Treat complications: diabetes preeclampsia © Poznyakov/Shutterstock
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Eclampsia/toxemia (ek-lamp'sē-ă), Occurrence of one or more convulsions, not attributable to other cerebral conditions such as epilepsy or cerebral hemorrhage, in a patient with preeclampsia. Farlex Partner Medical Dictionary © Farlex 2012 eclampsia /eclamp·sia/ (ĕ-klamp´se-ah) convulsions and coma, rarely coma alone, occurring in a pregnant or puerperal woman, and associated with hypertension, edema, and/or proteinuria.eclamp´tic
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Stages of Childbirth Dilation and effacement of the cervix
Delivery of the baby Delivery of the placenta © Monkey Business Images/Shutterstock
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Stages of Labor Figure 3.4 A Normal Birth Figure 3.4
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The Apgar Scale Table 3.2 (Source: Apgar, 1953.)
Table 3.2 The Apgar Scale
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Apgar Challenge clusters/health-science/nur402/apgar-scoring- challenge
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Birth Complications (pg 77-78)
Anoxia (oxygen deprivation) (an-ok'sē-ă), Avoid the careless substitution of this word for hypoxia or hypoxemia.Absence or almost complete absence of oxygen from inspired gases, arterial blood, or tissues. [G. an- priv. + oxygen] Farlex Partner Medical Dictionary © Farlex 2012
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Breech Birth
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Medical Interventions in Childbirth
Fetal monitoring Labor and delivery medication analgesics anesthetics Cesarean delivery © ARZTSAMUI/Shutterstock
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Reflection – page 78 Describe the features and benefits of natural childbirth. How might use of epidural analgesia negatively affect the parent-newborns relationship? What other considerations should be considered? If you were an expectant parent, would you choose home birth? Why or Why Not?
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Preterm and Small-for-Date Infants
Born several weeks or more before their due date Weight may be appropriate for length of pregnancy Small-for-Date May be either preterm or full-term Below expected weight for length of pregnancy Which one is more at risk during the first year?
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Interventions for Preterm Infants
Temperature-controlled isolette Special stimulation: gentle rocking visual or auditory stimulation touch, such as skin-to-skin kangaroo care Parent training in infant caregiving What is kangroo care? Is it effective? © Damon Yancy/Shutterstock
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Flex Video /simulation/newborn/index.html
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Infant States of Arousal
Rapid-eye-movement (REM) sleep Non-rapid-eye-movement (NREM) sleep Drowsiness Quiet alertness Waking activity and crying © Vasilyev Alexandr/Shutterstock
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Soothing a Crying Baby Hold on shoulder, rock or walk Swaddle
Offer pacifier Massage baby’s body Talk softly or play rhythmic sounds Combine methods How to sooth a crying baby video © Jo Tunney/Shutterstock
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Newborn Sense of Vision
Least developed sense at birth Limited visual acuity Actively explore environment: scan for interesting sights track moving objects Not yet good at discriminating colors © Saylakham/Shutterstock
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New Family Adjustment Hormones that facilitate caregiving:
oxytocin prolactin estrogens Hormonal effects may depend on experience Challenges of early weeks: new roles changed schedule © ClickPop/Shutterstock
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Learning Outcomes Three periods of prenatal development and milestones
Define teratogens and understand influence Impact of maternal factors on prenatal development Discuss medical complications Identify Common medical interventions during childbirth Describe use of APGAR Describe newborn baby’s reflexes Describe ways to sooth a crying baby Describe changes in a family after the birth
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