| 1. | Females come into oestrus once a year, probably around December.
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| 2. | In British English, the spelling is oestrus or Sstrus.
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| 3. | Males kill young to bring the female into oestrus.
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| 4. | They were kept apart when Lola came into oestrus.
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| 5. | But to an oestrus call males are perfectly silent, " said Langbauer.
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| 6. | These groups are led by adult males, depending on the presence of oestrus.
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| 7. | Females in oestrus may attract additional males.
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| 8. | Eosinophils along with basophils and mast cells, are important mediators of oestrus cycling, allograft rejection and neoplasia.
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| 9. | When one of his females comes into oestrus the male concentrates on her and mates with her several times.
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| 10. | Menstruation has little social impact among chimpanzees or bonobos, since visible oestrus swellings are the focus of male attention.
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