Conception (Fertilization) Joining of the egg and sperm.
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Transcript of Conception (Fertilization) Joining of the egg and sperm.
PRENATAL DEVELOPMENT
Conception (Fertilization) Joining of the egg and sperm
Egg ( ovum) I released each
month from the ovary
23 chromosomes
Sperm 23 chromosomes When Sperm and
egg unite we have what is called the zygote ( human cell)
Fertilization
46 chromosomes = zygote has all the genetic material.
Stage 1: Period of the Zygote Conception until 2 weeks old. Zygote travels from fallopian tube to
uterus This is a time of rapid cell division The zygote is nourished from the cell
and secretions in the fallopian tube and uterus.
Implantation: Occurs when the zygote attaches to the
thickened lining in the uterus. This lining nourishes the zygote ( therefore
no menstruation)
Stage 2: Period of the Embyro: 2 weeks to about 8 weeks During this stage all organs and
systems of the baby are made or developed
3 essential structures are formed 1) Placenta
Carries O2 and food to baby Carries CO2 and waste to the mother Stores nutrients ( iron, calcium, protein) Carries infections, antibodies, nicotine, liquor,
and drugs to the baby
2) Umbilical Cord Connects embryo to the placenta
Amniotic Sac Filled with fluid that acts as a shock
absorber for minor bumps and falls of themom, equalizes the pressure and provides nourishment.
Stage 3: Period of the fetus From 8- 40 weeks or birth Organs and systems grow and
mature Quickening ( 4th to 5th month) mom
feels life