Investigation Of Reproduction And Development In Animals :: essays research papers fc

Investigation of Reproduction and Development in AnimalsCycles, Conception and contraceptive methodFertility is the condition of being fertile. The aim of contraception is toinhibit mellowness in individuals, hence, slowing population growth. The systemby which all womanly contraception must operate the menstrual cycle.What is the menstrual cycle? and what endocrines be involved in controlling it?After puberty, the female produces an egg each(prenominal) month. Other changes take placeon a cyclic origination including the uterus lining and hormone levels. These changesare called the menstrual cycle. Follicle stimulating hormone (FSH) from thepituitary body gland stimulates the growth of follicles in the ovary. Folliclesproduce oestrogen that stimulates the pituitary to produce leutinising hormone(LH). As LH increases the size of the follicle increases until an egg isreleased. The head teacher luteum formed in the follicle secretes progesterone thatprepares the lining of the ut erus for pregnancy. If fertilisation does not occurthe lining of the uterus is discharged from the body in the wait on calledmenstruation.What is the deport control anovulant?The combined oral contraceptive tab key (the pill) is a reversable, hormonalmethod of birth control. The pill consists of a smorgasbord of two synthetichormones similar to oestrogen and progesterone, the womans vivid hormoneswhich regulate the menstrual cycle. The pill is on of the most popular methodsof birth control.How does it work?The pill basically prevents ovulation, therefore, the ovaries cant release amature egg. Without an egg for the sperm to fertilize , a woman cannot bumpregnant . The hormones also increase cervical mucus, making it difficult forsperm to pass into the uterus.How effective is the pill?If utilize correctly, the pill is highly effective. It has a less than one percentfailure rate. However, because many people ravish it, the actual failure rate ismore like three percent. The pi ll does not provide protection against sexuallytransmitted diseases.How are pills used?One pill must be swallowed at the same m every day. It is not any singlepill, but the day-to-day mathematical process of taking the pill which provides protectionagainst pregnancy.What is infertility?Infertility in earthly concern and other species(animals) is the inability to concieve orcarry a pregnancy to a live birth. The causes of infertility can be identifiedin nearly cases. The majority of cases relate to female factors (50%), 40% relateto male factors and 10% aree unknown. Infertility fewtimes may serve as a faction of both male and female factors.If the cause of infertility is known, treatment of some kind may be available.In other cases a trouble may disappear on its own and fertility is restored.