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− | == Introduction ==
| + | = Introduction = |
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− | == Male==
| + | = Male= |
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− | == Female == | + | == Age when Behavioural Traits are Expressed == |
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| + | == Age at First Ejaculation == |
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| + | == Age when Spermatozoa First Appear in the Ejaculate == |
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| + | == Age when Spermatozoa First Appear in the Urine == |
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| + | == Age when the Ejaculate Contains a Threshold Number of Spermatozoa == |
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| + | = Female = |
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| + | == Age at First Oestrus == |
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| + | == Age at First Ovulation == |
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| + | == Age at which the Female can Support Pregnancy without Deleterious Effects == |