Contraceptives

Contraceptives According to Microsoft Encarta Encyclopaedia contraception is a deliberate barroom of pregnancy using any of several methods. (Microsoft Encarta Encyclopaedia, 2004) thither argon many different forms of contraception available on forthwith offs market, save these can be unconnected take into two main types; hormonal and barrier contraceptives. obstruction method contraceptives are a physical barrier that celebrates spermatozoan from fertilizing the ovum. about like the male and female condom all told prevent the sharing of bodily fluids, while others such as the cervical cap and the diaphragm allow the sharing of bodily fluids, but create a barrier over the neck that sperm cannot pass through. (Wikipedia online encyclopaedia, 2006) Hormonal methods of contraception deliver ooestrogen and/or progesterone or the synthesised form of progesterone, progestin. These hormones affect ovulation and the growth of the uterus lining to prevent fam iliar reyield. (Microsoft Encarta Encyclopaedia, 2004) Sexual comeback ensures greater genetic variation because both parents contribute 23 chromosomes to their offspring, resulting in a unique combination of genes.

(In class lesson: 16/10/06) it is controlled by the interaction of the hormones secreted by the pituitary secretor and the ovaries There are four main hormones involved in sexual reproduction, these being Luteinising Hormone (LH), Follicle Stimulating Hormone (FSH), estrogen and Progesterone. LH and FSH are both released from the pituitary gland and gravel progesterone and oestrogen production and release by the ovaries. (Microsoft Encarta ! Encyclopaedia, 2004) (Class lesson: unmapped date in October) In females LH stimulates ovulation; in males LH stimulates the production of androgen. FSH is complimentary to LH as it stimulates the production of the ovum (in females) and sperm (in males). (Class lesson: unknown date in October) Oestrogen is produced in the ovaries and production peaks when LH...If you want to get a ample essay, order it on our website: BestEssayCheap.com

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