Conception And Pregnancy Flashcards
Where does conception occur?
The ampulla of the F-tube
Conception
The union of egg and sperm
Where does the ovum come from?
The Graafian follicle
Ovum
Female egg
Two layers of ovum
Zona pellucida, corona rodiata
How long is the ovum fertile?
24 hrs
Sperm
The male cell that fertilizes the ovum
How many sperm per enjaculation?
200-500 million
How do sperm move?
With the flagella
How long are sperm fertile?
72 hrs
What percent does a healthy cycle have to get pregnant?
25%
Capacitation
Conditioning responses of sperm when in female reproductive track. It allows enzymes need for penetration to be produced.
Fertilization
When the sperm enters the ovum
Where does fertilization occur?
The outer third of the ampulla
What happens soon after fertilization?
The nucleus form the pronuculi
Pronuculi
Distinct bodies of hero matin
How many autosomes are normal after conception?
22 autosomes and a sex chromosome
Female sex chromosome pair.
XX
Males sex chromosome set
XY
What is the sperm and ovum called after fertilization?
Zygote
How long does fertilization take?
24 hrs
Pre-embryonic phase is how long?
First two weeks
Division of cells: cleavage
Rapid cell mitosis
How many cells are there at the end of division of cells?
64