Examlex
Premodern Homo sapiens continued to live in caves and open-air sites, but may also have increased their use of caves.
Germinal Stage
The initial two weeks of prenatal development after conception, characterized by rapid cell division and the beginning of cell differentiation.
Embryonic Stage
A period of prenatal development from the second to the eighth week after conception, where major body structures and organs begin to form.
Fetal Stage
The fetal stage refers to a period in human development that begins during the 9th week of pregnancy and continues until birth, characterizing rapid growth and development of the fetus.
Prenatal Dangers
Hazards or risks to the health and development of a fetus during pregnancy, which can include substance exposure, infections, and poor maternal health.
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