Chapter 9: Nursing Care During Normal Pregnancy & Fetal Development

The text delineates the stages of intrauterine life, moving from fertilization and the pre-embryonic stage to the embryonic period—where critical organogenesis occurs and susceptibility to teratogens is highest—and finally to the fetal period characterized by maturation and growth. Essential support structures are analyzed in detail, including the decidua, the amniotic membranes, and the placenta, which functions as an endocrine gland producing human chorionic gonadotropin (hCG), human placental lactogen (hPL), estrogen, and progesterone to sustain pregnancy. The description covers the anatomy of the umbilical cord, noting the presence of Wharton jelly and the critical two-artery, one-vein vascular arrangement. Significant physiological adaptations are explored, such as fetal circulation which utilizes the ductus venosus, foramen ovale, and ductus arteriosus to bypass the lungs and liver, as well as the respiratory system's development of surfactant to prevent alveolar collapse. Key developmental milestones are highlighted, including the appearance of vernix caseosa and lanugo, and the maternal perception of fetal movement known as quickening. The chapter also outlines clinical assessment tools, including the Naegele rule for estimating the date of birth, the McDonald rule for measuring fundal height, and daily fetal movement counts. Furthermore, it details diagnostic procedures used to assess fetal health, such as nonstress testing (NST), vibroacoustic stimulation, biophysical profiles (BPP), ultrasonography for biparietal diameter and amniotic fluid volume, and invasive techniques like amniocentesis and percutaneous umbilical blood sampling (PUBS) for genetic and metabolic analysis.