| 1. | All placental mammals _ from mice to men _ have them.
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| 2. | National Marine Fisheries Service biologists analyzed placental blood to determine gender.
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| 3. | Adaptive radiation of marsupials excluded competition with their terrestrial placental counterparts.
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| 4. | A complete luteo-placental shift occurs by day 120 150.
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| 5. | The embryos are supported in placental yolk sac inside the mother.
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| 6. | Once the baby has been delivered placental management becomes an issue.
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| 7. | Placental derivatives are still available and are used in some laboratories.
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| 8. | Reproduction is a special kind of viviparity, called placental viviparity.
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| 9. | The main source of PGF during pregnancy is the placental trophoblast.
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| 10. | In marsupial and placental mammals, copulation occurs through the vagina.
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