Basic Embryology Flashcards
When does hCG begin to get secreted
About 6-7 days after fertilization
At what week do 2 sacs form (the amniotic sac and yolk sac)
Week 2
At what week do you get a 3 layered embryo
Week 3
What is the 3-layered embryo in week 3
Endoderm
Ectoderm
Mesoderm
At what week will the spinal cord and brain begin to form
Week 3
Name the week of development
Heart begins to beat and neural tube has closed
Week 4
At what week does the body begin to take shape
Week 4
Name the week of development
Organogenesis
Week 5-8
At what weeks is the fetus the most susceptible of the development to tetrogens
Week 5-8
At what weeks is the baby considered viable
24 weeks
What cells make up the placenta
Both fetal and maternal cells
What does the placenta form that will circulate the fetal blood
Chorionic villi
When is the development of the placenta complete
12 weeks
When does the b-hCG levels peak at
8-10 weeks
What do you want to suspect if the b-HCG is abnormally low
Ectopic or threatened abortion
What do you want to suspect if the b-hCG is abnormally high
Trophoblastic disease
What hormones does the placenta secrete
Estrogen Progesterone Human placental lactogen Corticotroponin-releasing hormone b-hCG
What hormone does the following:
Stimulates growth of uterus and breast tissue
Causes relaxation of ligaments including the SI joint
Estrogen
What hormone does the following;
Maintains the endometrial lining
Prevents preterm labor by decreasing myometrial contractility
Progesterone
What hormone does the following;
Stimulates the growth of mammory glands
Decreased maternal insulin sensitivity
Thought to play a role in gestational diabetes
Human placental lactogen
Name the hormone that does the following;
Plays a role in onset of labor, both term and preterm
Corticotropin-releasing hormone
What makes up the umbilical cord
2 arteries and 1 vein
