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Hormones in human reproduction Typeit
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From the onset of , hormones play an important role in the body in terms of human reproduction. They control the development of secondary sex characteristics, stimulate production in males, and control the menstrual cycle in females.
, the release of an egg due to the hormone LH, occurs approximately every days in females. Many other hormones interact to regulate the menstrual cycle, including , which causes an egg to mature, and oestrogen and , which maintain the lining of the uterus.
Some women take fertility drugs containing FSH and to increase their chances of becoming pregnant, while others may need to undergo the more comprehensive treatment. This treatment uses hormones to stimulate the maturation of the woman's eggs, which are then removed and fertilised in a laboratory. After they begin to develop into , one or two will be inserted into the woman's uterus. This procedure is often not successful, which can place a high amount of on the family.
In contrast, many women rely on to prevent them becoming pregnant. This can come in many forms, each with its own advantages and disadvantages. For example, condoms and diaphragms can act as a barrier to prevent the sperm reaching an , or the woman or the man can have surgery to sterilise them. Hormones can also be taken orally by the woman to inhibit FSH production, or progesterone can be released slowly via an , an implant or a skin patch to stop eggs being released as a long-term measure.
Hormones such as adrenaline and thyroxine also have roles beyond human reproduction, and their levels are often controlled by feedback. Thyroxine controls the body's rate, while adrenaline is involved in the fight or flight stress response.