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What does the sperm duct do?
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What does the ovary in females do?
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When can pollination occur?
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When does fertilisation of the ovule occur?
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What happens in 4 weeks of pregnancy?
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What is adolescence?
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What happens on day 1 of menstrual cycle?
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How often is an egg released?
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What are some changes In male bodies?
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What are some changes in Femal bodies?
