Felitization Flashcards
Wha is fertilization
Process by which male and female gametes unite to give rise to a zygote.
Where does fetilzation occur
Ampulla of the Fallopian tube
What aids in fertilization
Carbohydrates binding molecules and gametes specific protein in sperm egg recognitions.
What are the prerequisites for fertilization?
Mature oocyte Mature speematozoan Capacitation of the spermatozoa Quality and quantity Fusion of sperm and ovum , with 12 hrs
How long does the mature spermatozoan still in the ductus
2-3 weeks
When does sperm become motile?
Vagina
What is the acrosome made up of?
Golgi apparatus
When capitation occurs?
In the female
Oligasperm
Less than 20million of sperm per liter , less than 30% abnormal sperms or less than 70% inmotile. Are less than 1-5 ml of sperm per ejaculate.
What cause ogliosperm phase?
Drinking, stressful jobs, smoking
1 st phrase of fertilization. Passage of sperm through corona radiation
II
Zona reaction
What isn’t
What is triplioded?
Why
What is an Otis
Ddd
Once a zygote is formed what type of
Mitotic
Results of fertilization
Innitiation, restoration , determination of chromosomal sex of embryo
What is cleavage?
Repeated mitotic divisions of the zygote resulting in rapid increase increase in the number of cells.
What is a morula?
Occurs after 72 hours, its a 12-16 cell stage
Is the zona of pellucida attached in the morula stage?
Yes
What is a cyst?
Fdd
A blastocele is formed to a
Blastocyst,
What is the inner cell mass?
Kk
When does the zona pucudia disappears?
Cleavage
What is the polar trophoblast.
Kk
What is the function of trophoblast
Enzyme cells that eat away whatever it comes in contact with
What is implantation?
Mm
Where does implantation take places?
Polar trophoblast
When does implantation occurs?
6th day
What is implantation bleeding?
Spotting, occurs on the 6th day of fertilization
What is invitofertilization?
Zz
What is capitation ?
the process by which the glycoprotein coat and the seminal proteins are removed from the surface of the sperm’s acrosome by substances secreted by the uterus or fallopian tubes of the female genital tract, thereby permitting the acrosome reaction to occur.
Does motility make a spermatozoa mature
.
No, motility of spermatozoa only take place when the spermatozoa enter the Fallopian tube
Can freshly evacuated sperm fertilize can oocyte?
No, sperm must undergo capacitation
