Prenatal Development and the Newborn Period Study Notes

Chapter Two: Prenatal Development and the Newborn Period

Overview

  • Themes:
    • Nature and Nurture
    • The Active Child
    • Sociocultural Context
    • Individual Differences
    • Continuity and Discontinuity
    • Research and Children’s Welfare

Investigating Infant Learning

  • Example scenario involving a developmental psychologist studying infant learning through auditory exposure to a nonsense word "Tatata".
  • Emphasis on the importance of being born for research study completion.
  • Reference: Pardanan, Kuala, Trevenimi et al., 2013.

Importance of Prenatal Development

  • Fetuses can detect and learn from stimuli from inside and outside the womb.
  • Examines rapid and dramatic changes in prenatal development and how these processes can be disrupted.
  • Discusses birth experiences and aspects of neonatal behavior.
  • Addresses issues related to low birth weight and premature birth.

Key Themes in Prenatal Development

  • Nature and Nurture:
    • Interplay of biological and environmental factors throughout prenatal development.
  • Active Child:
    • Fetal activity contributes to its own development.
  • Sociocultural Context:
    • Variability in pregnancy experiences and cultures.
  • Individual Differences:
    • Differences in prenatal and early postnatal development.
  • Continuity and Discontinuity:
    • Prenatal behaviors show connections to newborn experiences.
  • Research in Child Welfare:
    • Effects of poverty on prenatal development and interventions for healthy development.

Cultural Perspectives on Beginning of Life

  • Box 2.1: Cultural beliefs around the beginning of life and conception.
  • Example of the Ben people in the Ivory Coast who view newborns as reincarnations of ancestors.
  • Newborns believed to exist in a dual state until the umbilical stump drops off.

Historical Perspectives on Prenatal Development

  • Aristotle's theory of epigenesis, where he observed the evolution of structures during development, influencing thoughts on developmental biology.
  • Definitions:
    • Zygote: Single cell resulting from the union of sperm and egg.
    • Gametes: Germ cells (sperm and ova) containing half of the genetic material.

Conception Process

  • Meiosis: The process of cell division that produces gametes.
  • Conception involves the egg's travel through the fallopian tube which attracts sperm via chemical signals.
  • About 500 million sperm can be released but only a few reach the egg.
  • Importance of sperm health and genetic compatibility when fertilizing the egg.

Developmental Stages: From Zygote to Newborn

  • Processes Underlying Development:
    • Mitosis: Cell division leading to numerous identical cells.
    • Cell Migration: Movement of cells to specialized locations in the embryo.
    • Cell Differentiation: Stem cells become specialized for various functions.
    • Apoptosis: Genetically programmed cell death crucial for development, for example, in hand formation.
Hormones in Prenatal Development
  • Hormonal roles in fetal development, including the importants of androgens for sexual differentiation.
  • Hormones influence growth and maturation of fetal organs.

The General Course of Prenatal Development

  • Early Development:
    • Zygote travels and forms a hollow sphere, leading to identical twins from the inner cell mass splitting.
  • Ectopic Pregnancies: Occurs when the zygote implants outside the uterine lining.
  • Embryo differentiation into three layers leading to various organ systems.
Fetal Development Timeline
  • Detailed weekly milestones from zygote to fetus characterized by rapid changes, including facial features, brain growth, and potential for feeling and movement.

Fetal Experience and Behavior

  • Importance of fetal sensory experiences shaping development:
    • Fetal movements, swallowing amniotic fluid, and breathing exercises.
    • Responses to noise and taste preferences shaped by fetal exposure.
Hazards to Prenatal Development
  • Miscarriage: Frequency and influences of spontaneous abortion occurring shortly post conception.
  • Teratogens: Environmental agents causing harmful impacts on fetal development.
  • Risk factors: Maternal age, health behaviors, nutrition, and exposure to drugs or stress.

Birth Process

  • Involves uterine contractions and hormonal pathways, where the fetus plays a significant role in triggering labor.
  • Different cultural practices regarding childbirth, including the medicalization of birth in some societies vs more traditional supporting roles in others.

The Newborn Infant

  • Newborn interactions with their environment are influenced by arousal levels and states.
  • Exploration and behaviors present from birth, with an emphasis on sensory and social engagement.
Sleep and Crying Patterns
  • Crying: Peaks at 6-8 weeks and the typical parental response strategies.
  • Sleep: Importance of REM and non-REM sleep in neurological development and the influence of diet on sleep patterns.
Infant Mortality and Birth Weight
  • Analysis of infant mortality rates in the USA compared to other developed nations.
  • Impacts of low birth weight and prematurity on long-term developmental outcomes, with discussion on intervention programs for LBW infants.
Multiple Risk Models
  • Explanation of how combined risk factors impact fetal development and health outcomes across various domains including social, environmental, and healthcare systems.
Resilience in Development
  • Definition and importance of resilience even in the face of adverse conditions, underscoring the role of supportive environments and personal characteristics.
Summary of Key Concepts
  • Prenatal development entails an active fetus influenced by both nature and nurture, with significant repercussions leading into postnatal life.
Review Questions
  • A list of reflective and analytical questions designed to assess understanding of chapter concepts and encourage critical thinking.