Glossary

Browse through glands, hormones and endocrine conditions.
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Throughout the website we provide links to relevant patient groups, who may be able to provide advice and support

Hormones of pregnancy and labour

This article describes hormones that play an important role in pregnancy and labour.

Human chorionic gonadotrophin

Human chorionic gonadotrophin is a reproductive hormone that is essential for establishing and maintaining early pregnancy.

Hormones and conservation

The study of animal reproductive systems and regular monitoring of reproductive and stress hormones is important for conservation.

Hormones and fetal growth

Growth of the fetus during pregnancy is regulated by a balance of hormones.

Hashimoto's disease

Hashimoto's disease is an autoimmune disease that causes inflammation of the thyroid gland and results in a reduction in thyroid hormone levels.

Hypoparathyroidism

Hypoparathyroidism is a rare condition characterised by inadequate parathyroid hormone production from the parathyroid glands, resulting in low calcium levels in the bloodstream.

Hypophosphataemia

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

Hyperthyroidism is a common condition where the thyroid gland becomes overactive and produces too much thyroid hormone.

Hypopituitarism

Hypopituitarism is the failure of production of one or more hormones from the pituitary gland.

Hypercalcaemia

Hypercalcaemia is the presence of abnormally high calcium levels in the blood.

Hypothyroidism

Hypothyroidism is a condition that develops when the thyroid gland is unable to produce enough thyroid hormones.

Hypocalcaemia

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

Hyponatraemia means abnormally low levels of sodium (salt) in the bloodstream or a deficiency of sodium in the body.

Hypothalamus

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.

hypertension

high blood pressure.

hysterectomy

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

Hirsutism is the presence of excess male-pattern hair growth in women and is commonly caused by an imbalance of hormones.

HIV

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.


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