1887

Physiology and endocrinology of the female

image of Physiology and endocrinology of the female
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Abstract

In the majority of domestic species the interval between one ovulation and another is approximately 21 days. The cycles of the domestic bitch and queen differ from this general scheme. This chapter considers the hypothalamic-gonadal axis; the bitch and queen’s puberty, peak fertility, cyclicity and oestrous cycle.

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Figures

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1.1 Hypothalamic–pituitary–gonadal axis, demonstrating the site of hormonal production and feedback loops. FSH = follicle-stimulating hormone; GnRH = gonadotrophin-releasing hormone; LH = luteinizing hormone.
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1.2 Different stages of oogenesis. The time of ovulation in the bitch and queen is shown.
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1.3 Different stages of the oestrous cycle in relation to changes in plasma hormone concentrations and ovulation.
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1.4 Periovulatory changes in plasma oestrogen, LH and progesterone concentrations in the bitch.
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1.5 Onset and duration of the fertile and fertilization periods of the bitch in relation to periovulatory physiological events.
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1.6 Plasma progesterone concentrations during the luteal phase in the pregnant and non-pregnant bitch.
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1.7 Endocrinological changes during pregnancy and lactation in the bitch.
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1.8 Plasma progesterone concentrations during the luteal phase in the pregnant and non-pregnant queen.
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1.9 Endocrinological changes during pregnancy and lactation in the queen.
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