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Prenatal Care – Module A. NUR 106 Spring, 2005. Anatomical Landmarks. Female Male. External Structures. Internal Structures. Midsagital View. Uterus. Uterine Ligaments. Pelvic Bones. Female Pelvis. Pelvic Types. Muscles of the Pelvic Floor. Male: External and Internal Structures.
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Prenatal Care – Module A NUR 106 Spring, 2005
Anatomical Landmarks • Female • Male
Female Reproductive Cycle • Ovulation • Menstruation • Menarche • Climacteric • Menopause
Conception and Fetal Development • Nine Month Miracle • Miracle of Life • Internet sites
Conception • Fertility • Sexual intercourse • Pregnancy
Genetics • Chromosomes • Autosomal • Sex • Chromosomal syndromes • Modes of inheritance
Patterns of Inheritance • Dominant • Recessive • X-linked
Nursing Responsibilities • Identify families at risk • Education • Liaison • Support / Crisis intervention • Continuity of care
Teratogens • Tobacco • Alcohol • Marijuana • Cocaine • Heroin • Anticonvulsants • Anticoagulants • Acne medications
Reproductive Ethics • Maternal-fetal conflict • Abortion • Intrauterine fetal surgery • Reproductive assistance • Embryonic stem cell research • Human genome project • Cord blood banking
Fertilization • One spermatozoon enters the ovum • Two nuclei containing the parents’ chromosomes merge • Occurs in the outer third of the fallopian tube • Sex is determined
Multifetal Pregnancy • Dizygotic twinning -- fraternal • Monozygotic twinning -- identical
Implantation • Nidation • Gradual process • Occurs between 6th / 7th and 10th days • Upper part of posterior uterine wall • Placenta develops
Amniotic Membranes • Amnion (inner) • Chorion (outer) • Enclose fetus in amniotic fluid • Protects fetus from infectious organisms
Amniotic Fluid • Clear, slightly yellow, alkaline fluid • Approximately 1 liter at term • Derived from • Maternal plasma • Cells of the amnion • Fetal fluids from lung, skin, fetal urine
Functions of Amniotic Fluid • Cushions fetus from trauma • Facilitates fetal movement • Facilitates symmetrical growth • Regulates intrauterine temperature • Provides source of oral fluid • Cushions umbilical cord • Receptacle for fetal substances
Placenta / Function • Fully functional by week 12 • Respiration • Nutrition • Waste removal • Protection • Endocrine
Umbilical Cord • One vein • Two arteries • Wharton’s jelly • Amnion
Fetal Development • Preembryonic or ovum • Embryonic • Fetal
Fetal Circulation • Ductus venosus • Ductus arteriosus • Foramen ovale
Factors Affecting Fetal Development • Exposure to teratogens • Maternal health habits and lifestyle • Paternal health habits and exposure to environmental influences
Physiological Changes During Pregnancy • Uterus • Ligaments • Cervix • Chadwick’s • Goodell’s • Hegar’s • Breast • Montgomery tubercles • Skin