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Unformatted text preview: Types of Sperm Male Sperm Y Swim FAST Genetically WEAK Female Sperm X Swim SLOW Genetically STRONG 2/10/10 3 Periods of Prenatal Development Germinal First 2 weeks creation of the zygote (fertilized egg) Embryonic 2-8 weeks Organs begin to form Fetal 8 weeks-birth Rapid organ development In the Womb...
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- Spring '10