STAGE 1 Approximatelymm in diameter Approximately 1 postovulatory day Characteristic feature: unicellularity Embryonic life commences with fertilization, and

Source URL: www.medicalmuseum.mil

• Reproductive system
• Fertility
• Female reproductive system
• Developmental biology
• Pronucleus
• Spermatozoon
• Zona pellucida
• Immature ovum
• Oocyte
• Biology
• Germ cells
• Reproduction