Unformatted text preview: th week till birth 1. Period of the Ovum First two weeks o Cell division o Blastocyst o Implantation 2. Period of the Embryo End of the 2 nd week till the 8 th week o Endoderm – digestive system. Lungs, internal organs form o Mesoderm – muscular, skeletal, and circulatory system are formed o Ectoderm – hair nails and teeth form o Most likely time period for miscarriage Pregnancy Support Structures- Occurs during the Period of Embryo o Amniotic sac o Placenta o Umbilical cord o 20-25% of pregnancies miscarry (spontaneous abortion)...
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- Spring '08
- Obstetrics, Embryo, Prenatal Development Prenatal, withdraws amniotic fluid, Prenatal Testing Routine