6: Vocabulary Flashcards
Thinning of the cervix.
Effacement
First anatomic structure to appear within gestational sac.
Yolk sac
Hypertrophy of the gums
Epulis
The number of pregnancies carried to viable gestational age (20 weeks).
Parity
Dark line beginning near the sternal notch and continuing downward to the symphysis pubis and genitalia.
Linea nigra
Measurement of fundal height using a tape measure.
McDonald Maneuver
Formation of endoderm, mesoderm, ectoderm.
Gastrulation
The number of pregnancies, regardless of outcome.
Gravidity
Fetal movement
Quickening
Softening of the cervix
Goodell sign
Softening of lower uterine segment
Hegar’s sign
Comes from the hypoblast and forms digestive tube and produces blood cells and vessels and gonads.
Yolk sac
Blue/purple cervix
Chadwick sign
Pregnancy mask
Chloasma gravidarum
Soft blowing sound d/t blood pulsating through placenta
Uterine souffle
Stretch marks
Striae gravidarum
Fundal height drops around 38 weeks in primigravidas, but may not happen until labor for multigravidas.
Lightening
Development from zygote to week 2.
Preembryonic development
Transparent membranous sac that fills with fluid.
Amnion
Outpocket of caudal end of yolk sac. Forms umbilical cord and urinary bladder.
Allantois
Helps form placenta. Encloses embryo and other membranes.
Chorion
Structure that will establish bilateral symmetry in embryo.
Primitive streak
Primary germ layers are organized into sheets by this.
Mesenchyme
Primary germ layer that forms neural crest and nervous system, skin.
Ectoderm
Primary germ layer that forms epithelial lining of digestive, respiratory, and urogenital tracts and glands.
Endoderm
Primary germ layer that forms everything except neural crest, nervous system, skin, epithelial linings.
Mesoderm
Differentiation of the germ layers.
Organogenesis
Outermost of the 3 germ layers.
Ectoderm
These become sclerotome, dermatome, and myotome.
Somites
Somites that form vertebrae and ribs.
Sclerotome
The lateral wall of each somite in a vertebrate embryo, giving rise to the connective tissue of the skin.
Dermatome
Somites that form skeletal muscle.
Myotome
