Hormones in human reproduction GapFill

Human sexual characteristics are all controlled by  spermnerveseggshormones. During  breastfeedingchildhoodpubertysleep, hormones are produced for the first time, causing the development of  primaryseasonalsecondarytemporary sexual characteristics, such as growth of body hair and  heighteningdeepeningdecreased volumedecreased speed of the voice.

The main sex hormone in females is  serotoninoestrogentestosteroneprogesterone, whilst in males it is  oestrogenserotonincortisoltestosterone. Oestrogen and progesterone play a role in maintaining the lining of the  musclesarteriesovariesuterus during the  fertilisationfertilitymenstrualfeedback cycle, which repeats every approximately  40182814 days. In addition, FSH and  DNAIVFLHADH stimulate the maturation and release of an egg from the ovary.

Human fertility can be controlled through the use of contraception. Methods of contraception include using artificial  hormonesinseminationengineeringenzymes to prevent the maturation or release of an egg, or the use of  fencestoppageblockadebarrier methods to prevent  spermhormonesenzymesblood coming into contact with an egg. Surgical cutting methods can also be used, restricting the movement of the egg to the uterus or sperm from the testicles.

Hormones can also be used in IVF to treat  diabetesmeningitiscystic fibrosisinfertility if a woman is struggling to conceive, and can be controlled by  sexual loopfertile loopnegative feedbackpositive feedback mechanisms in the body in normal day-to-day life.