Unit 5: Reproduction Flashcards
What is the difference between presumptive, probable, and positive signs of pregnancy?
Presumptive - obsserved by mother
Probable - observed by health care provider
Positive - objective signs assessed by an examiner
What are presumptive signs?
N/V
Fatigue
Breast changes
Quickening (fetal movement)
Amenorrhea
What are probable signs?
Hegar’s: softening and compressibility of lower uterus
Chadwicks: deepened violet-bluish color of cervix and vaginal mucose
Goodell: softening of cervical tip
What are positive signs?
Fetal heart sounds
Visualization of fetus by ultrasound
Fetal movement
What is impantation?
trophoblast secretes enzymes that allow it to burrow into the endometrium (6-10 days)
What is development of the embryo?
Most critical time for organ system development and external features
day 15 - week 8
What is amniotic fluid function?
Cushioning
Regulation of temperature
Kidney function
The volume is important to fetal well-being
Vernix caseosa protects fetus skin
What is chorionic villi and decidua basalis?
Chorionic Villi is responsible for oxygen, nutrition, and waste
Decidua basalis taps into maternal blood vessels
What is the function of the umbilical cord?
Supplies embryo with maternal nutrients and oxygen
What is the function of the placenta?
Metabolic exchange
Nutrient storage
Endocrine gland – HcG, Human placental lactogen, Progesterone, Estrogen
What is HcG?
Ensures supply of estrogen and progesterone needed for pregnancy
Will give the positive on urine test
What is Human placental lactogen
Stimulates maternal metabolism
Increases resistance to insulin
Facilitates glucose transport
Stimulates breast development
What is progesterone?
maintains endometrium
decreases the contractility of uterus
stimulates metabolism
development of breast alveoli
What is estrogen?
stimulates uterine growth and blood flow
Stimulates myometrial contractility
Proliferation of breast glandular
What is fetal circulatory system?
FHR 110-160
Bypass: ductus arteriosus - lungs; ductus venosus - liver; foramen ovale -a hole in the heart that allows blood to flow between the left and right atrium
What is viability?
capability of fetus to survive outside uterus
Usually around 24 weeks
Based on CNS function and lungs