Chapter 23 (The First Trimester) Flashcards
Fertilization typically occurs within ____ hours after ovulation?
24 hours
The most common site of fertilization is within the:
ampulla of the uterine tube
The structure created by the union of sperm and egg is the:
zygote
The trophoblastic cells produce:
hCG
What is the stage of the conceptus that implants within the decidualized endometrium?
blastocyst
Another name for the chorionic sac is the:
gestational sac
What structure lies within the extraembryonic coelem?
yolk sac
What hormone, produced by the corpus luteum, maintains the thickened endometrium?
progesterone
In the first trimester, normal hCG levels will :
double every 48 hours
Compared with a normal IUP, the ectopic pregnancy will have a ____ hCG?
low
The first son. sign of pregnancy:
decidual reaction
The first definitive son. sign of an intrauterine pregnancy is the recognition of a:
gestational sac
The normal gestational sac will grow:
1mm a day
During a first trimester exam, you note a cystic structure within the fetal head. This most likely represents the:
rhombencephalon
The herniation of the embryologic bowel into the base of the umbilical cord at 9 weeks is referred to as:
physiologic bowel herniation