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This article describes hormones that play an important role in pregnancy and labour.
Human chorionic gonadotrophin is a reproductive hormone that is essential for establishing and maintaining early pregnancy.
The study of animal reproductive systems and regular monitoring of reproductive and stress hormones is important for conservation.
Growth of the fetus during pregnancy is regulated by a balance of hormones.
Hashimoto's disease is an autoimmune disease that causes inflammation of the thyroid gland and results in a reduction in thyroid hormone levels.
Hypoparathyroidism is a rare condition characterised by inadequate parathyroid hormone production from the parathyroid glands, resulting in low calcium levels in the bloodstream.
Hypophosphataemia is the term used to describe low levels of phosphate in the blood. It is most commonly caused by hyperparathyroidism and vitamin D deficiency.
Hyperthyroidism is a common condition where the thyroid gland becomes overactive and produces too much thyroid hormone.
Hypopituitarism is the failure of production of one or more hormones from the pituitary gland.
Hypercalcaemia is the presence of abnormally high calcium levels in the blood.
Hypothyroidism is a condition that develops when the thyroid gland is unable to produce enough thyroid hormones.
Hypocalcaemia refers to low calcium levels in the blood. It is most commonly caused by either vitamin D deficiency or diseases of the parathyroid glands.
Hyponatraemia means abnormally low levels of sodium (salt) in the bloodstream or a deficiency of sodium in the body.
The hypothalamus is a part of the brain that has a vital role in controlling many bodily functions including the release of hormones from the pituitary gland.
high blood pressure.
an operation to remove a woman's womb and ovaries, resulting in the menopause. A partial hysterectomy can be performed where the ovaries are preserved, which does not result in the menopause.
Hirsutism is the presence of excess male-pattern hair growth in women and is commonly caused by an imbalance of hormones.
HIV (human immunodeficiency virus) is a virus that damages the cells in the immune system and weakens the ability to fight everyday infections and disease. HIV is transmitted through sexual intercourse, sharing needles and from mother to baby during pregnancy.