Gametogenisis, Fertilization, Physiology Flashcards
(68 cards)
What is the diameter of a fully mature ovum?
130 microns
Cheetha mutta kondu angu vittalo
What is spermatogenesis?
Spermatogonium to mature spermatozoon 61/75days
Shastipoorthiyaya sperm
The process of sperm cell development
What surrounds the mature ovum?
Vitelline membrane
Cheetha mutta kondu angu vittalo
What is the outer transparent mucoprotein envelope of the ovum called?
Zona pellucida
How long does it take for a spermatogonium to develop into a mature spermatozoon?
61 days (or 75 days)
Where does fertilization occur?
In the ampullary part of the fallopian tube
What is the fertilizable life span of an oocyte?
12-24 hours
What is the fertilizable life span of sperm?
48-72 hours
At what stage does the embryo reach the 2-cell stage?
After 30 hours
What does the morula resemble?
Mulberry at 4th week enters uterine cavity
Kalam moori
When does the morula enter the uterine cavity?
4th day
What is the endometrium of the pregnant uterus called?
Decidua
When does implantation occur?
6th day, completed by 10-11th day
Arathu arathu keri
What are the four stages of implantation?
- Apposition
- Adhesion
- Penetration
- Invasion
What are the three layers of the decidua?
- Superficial compact
- Intermediate spongy
- Basal layer
What is the fetal part of the placenta called?
Chorion frondosum
What is the diameter of the placenta at term?
15-20 cm
What is the volume of the placenta?
500 ml
What is the thickness of the placenta considered abnormal?
Above 45 mm normal 30 mm
What is the outer layer of fetal membranes?
Chorion
What is the inner layer of fetal membranes?
Amnion
What is the specific gravity of amniotic fluid?
1.010
What does meconium staining green indicate?
Fetal distress
Treess green
What is the normal length of the umbilical cord?
40 cm, with a variation of 30-100 cm