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The essential features of human reproduction
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- 1Liberation of an ovum, or egg,at a specific time in the reproductive cycle.
- 2Internal fertilizationof the ovum by spermatozoa, or sperm cells.
- 3Transportof the fertilized ovum to the uterus, or womb.
- 4Implantation of the blastocyst,the early embryo developed from the fertilized ovum, in the wall of the uterus.
- 5Formation of a placentaand maintenance of the unborn child during the entire period of gestation.
- 6Birthof the child and expulsion of the placenta.
- 7Sucklingand care of the child, with an eventual return of the maternal organs to virtually their original state.
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- The essential features of human reproduction
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- Sergio Cruz
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