Lecture 3 Flashcards
Conception is with
2nd degree oocyte (mature ovum) + spermatozoon
Conception occurs ___ - _____ hours of ovulation
24-36
Best days of cycle for conception
14 to 15
Conception forms
A single cell zygote
Conception occurs within the ______ region of fallopian tube
Ampullary
Zygote has how many chromosomes
46
Diploid number
Explain the chromosome breakdown
22 autosomal and 1 pair of ssex chromosomes
Each parent contributes ____ chromosomes
23
The conceptus is developing as it travels through
Fallopian tube
Cleavage
Zygot rapidly divides, each division cells double and become smaller
Size of zygote =
Size of morula
What is morula
12-15 cells
Morula will develop a fluid filled cavity call
Blastocyst cavity or blastocele
The conceptus at day 5 is called
Blastocyst
Blastocyst aka
Blastula
3 distinct parts of the blastocyst
Trophoblast
Embryoblast/ ICM
Blastocele
What does trophoblast do
Makes future placenta (embryonic part)
Produces HCG that supports CL
What does Embryoblast/ICM do
Will develop into embryo
What is Blastocele
Fluid filled cavity
Blastocyst implants on day ___-___ of lmp
20-23
Blastocyst impplants how many days after fertilization
5
What will the amniotic cavity do
Will house the pregnancy within the gestational sac
What will chorion develop into
Placenta
What does yolk sac provide
Nutrient to the developing fetus
