Lesson 6 Flashcards
Ovulation to fertilization
Ovum
Fertilization to implantation
Zygote
From implantation to 5-8 weeks
Embryo
From 5-8 weeks to term
Fetus
The developing embryo and placental structure throughout the pregnancy
Conceptus
The earliest age at which fetuses survive
Age of viability
How many weeks is accepted for the age of viability
24 weeks
How many weight of the fetus is accepted for the age of viability
500-600g
Another name for fertilization
Conception or Impregnation
Union of ovum and spermatozoon
Fertilization
The fertilization occurs in the ??
Ampulla (fallopian tube)
Ovum is capable for fertilization for only about
24 hours (or 48 hours)
The functional life of spermatozoon is also about ??
48 hours (as long sa 72 hourd)
Critical time span for sexual intercourse
72 hours
Ring of mucopolysaccharide fluid
Zona pellucida
The circle of cells
Corona radiata
Ejaculation of 2.5 ml of semen contains
20-200 million sperms
The sperms reach the cervix within 80 seconds and the outer end of the fallopian tube within 5 minutes after deposition
Orgasm
The sperms reach the cervix within 80 seconds and the outer end of the fallopian tube within 5 minutes after deposition
Orgasm
How does the sperm move?
By its flagella
Changes in the plasma membrane of the sperm head
Capacitation
It is released by the sperm and dissolves the protective corona radiata
Hyaluronidase
Multiple sperm enter leading to abnormal growth
Hydatidiform mole
Multiple sperms enter leading to abnormal growth
Hydatidiform mole
A chromosomal material fuse forming
Zygote
XX
Female
XY
Male
It is the cleavage
Mitosis
The first cleavage occurs at
48 hours
A bumpy mulberry-like ball og 16-50 cells called
Morulla
A morulla consists of how many cells
16-50
A fluid space surrounding an inner cell mass which attaches to the endometrium
Blastocyst
What are the parts of blastocyst
Trophoblast cells
Embryoblast cells
Blastocyst cavity
Thin outer layer of cell in blastocyst
Trophoblast
Inner layer of the cell in blastocyst
Embryoblast cells
The fluid filled cavity that later form into amniotic cavity
Blastocyst cavity
cells forming the outer layer of a blastocyst
Trophoblast
cells forming the inner layer of a blastocys
Embryoblast
Contact between the blastocyst and the endometrium
Implantation or nidation
Another term for Implantation
Nidation
Implantation occurs ???
8-10 days after fertilization
3 Phases of Implantation
Apposition
Adhesion
Invasion
Blastocyst brushes against the endometrium
Apposition
Blastocyst attaches to the surface of endometrium
Adhesion
Blastocyst settles down into the soft folds of endometrium
Invasion
The proteolytic enzyme
Hyaluronidase
What is the position of implantation
High in the uterus, posterior portion
The vaginal spotting usually occurs in
Implantation
Oncr implanted, zygote is an
Embryo
Mucosal lining of the uterus that forms during pregnancy
Decidua
After the attachment of zygote, the endometrium is known as _____
Decidua
Promotes milk production
Prolactin
Relaxes CT of symphysis pubis and pelvic ligaments, promotes cervical dilates
Relaxin
Potent hormone like fatty acid
Prostaglandin
Latin word for decidua
Falling off
3 parts of decidua
Decidua Basalis
Decidua Capsularis
Decidua Vera
Part of decidua that lies directly under the embryo
Decidua Basalis
Portion of decidua that stretches or encapsulates the surface of the trophoblast
Decidua Capsularis
Part of decidua that is “the remaining portion of the uterine lining”
Decidua basalis
