Hormones in human reproduction GapFill

Human sexual characteristics are all controlled by  nervesspermenzymeseggshormonesenvironmental factors. During  exercisesleepbreastfeedingpubertychildhoodreproduction, hormones are produced for the first time, causing the development of  tertiaryhormonalprimarysecondarytemporaryseasonal sexual characteristics, such as growth of body hair and  deepeningdecreased volumeheighteninglossincreased volumedecreased speed of the voice.

The main sex hormone in females is  LHtestosteroneadrenalineoestrogenserotoninprogesterone, whilst in males it is  cortisolserotoninadrenalineinsulintestosteroneoestrogen. Oestrogen and progesterone play a role in maintaining the lining of the  heartbreastsuterusarteriesovariesmuscles during the  periodfeedbackfertilitycardiacmenstrualfertilisation cycle, which repeats every approximately  28202144018 days. In addition, FSH and  HIVATPADHLHDNAIVF 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  selectioninseminationhormonesreproductionenzymesengineering to prevent the maturation or release of an egg, or the use of  barrierblockadewallgatefencestoppage methods to prevent  pollenhormonesseedsenzymesspermblood 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.