Chapter 3 Prenatal Development Birth
Prenatal Development
Birth
ThePostpartum Period
The Course of Prenatal Development
The germinalperiod
The germinal period of prenatal development occurs in the first 2 weeks
after conception
It includes
creation of the zygote
Continued cell division
Attachment of the zygote to the uterine wall
Blastocyst inner layer of cells that develops into the embryo
Trophoblast outer layer of cells that provides nutrition
support for the embryo
Typical Prenatal development begins w fertilization ends w birth takesbtwn
266 280 days 38 40 wks
It can be divided into 3 parts
germinal embryonic fetal
, Conception
occurs when a single sperm cell from male unites w an ovum
egg in female's fallopian tube in process called fertilization
Prenatal Development
Begins w fertilization ends w birth
takes btwn 266 280 days 38 to 40weeks
Divided into 3 periods
Germinal
Embryonic
Fetal
Germinal Period of Prenatal Development
takes place during first 2 weeks after conception
Includes
Creation of the fertilized egg called a zygote
Cell divison recall this occurs through a process called mitosis
Attachment of the zygote to uterine wall
Differentiation
specialization of cells to perform various tasks
starts to take place 1 week after conception
Group of cells are now called thegerminal blastocyst
GerminalBlastocyst Theinnerlayer of cellsthat developsduringthe germinalperiod These
cells later develop into the embryo
Prenatal Development
Birth
ThePostpartum Period
The Course of Prenatal Development
The germinalperiod
The germinal period of prenatal development occurs in the first 2 weeks
after conception
It includes
creation of the zygote
Continued cell division
Attachment of the zygote to the uterine wall
Blastocyst inner layer of cells that develops into the embryo
Trophoblast outer layer of cells that provides nutrition
support for the embryo
Typical Prenatal development begins w fertilization ends w birth takesbtwn
266 280 days 38 40 wks
It can be divided into 3 parts
germinal embryonic fetal
, Conception
occurs when a single sperm cell from male unites w an ovum
egg in female's fallopian tube in process called fertilization
Prenatal Development
Begins w fertilization ends w birth
takes btwn 266 280 days 38 to 40weeks
Divided into 3 periods
Germinal
Embryonic
Fetal
Germinal Period of Prenatal Development
takes place during first 2 weeks after conception
Includes
Creation of the fertilized egg called a zygote
Cell divison recall this occurs through a process called mitosis
Attachment of the zygote to uterine wall
Differentiation
specialization of cells to perform various tasks
starts to take place 1 week after conception
Group of cells are now called thegerminal blastocyst
GerminalBlastocyst Theinnerlayer of cellsthat developsduringthe germinalperiod These
cells later develop into the embryo
