Contraceptives

Contraceptives According to Microsoft Encarta Encyclopaedia contraception is a deliberate cover of pregnancy using any of several methods. (Microsoft Encarta Encyclopaedia, 2004) thither atomic number 18 many different forms of contraception available on corking offs market, save these can be humiliated take into two main types; hormonal and barrier contraceptives. barrier method contraceptives are a physical barrier that celebrates sperm cell from fertilizing the ovum. about like the male and female condom altogether 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 opening 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 developing of the uterus lining to prevent familiar reyield. (Microsoft Encarta Encyclopaedia, 2004) Sexual reverberation 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 secreter 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 secretor and gravel progesterone an d oestrogen production and release by the ov! aries. (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: OrderCustomPaper.com

If you want to get a full essay, visit our page: write my paper