Reproduction - from reaching the uterus. Oral...

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Reproduction: New and Improved? New techniques have been developed to enhance or reduce the chances of conception. Social conventions and governing laws have developed far slower than this new technology, leading to controversy about moral, ethical, and legal grounds for the uses of such technologies. The separation of intercourse from pregnancy uses methods blocking one of the three stages of reproduction" release and transport of gametes fertilization implantation Effectiveness Various contraceptive methods have been developed; none of which is 100% successful at preventing pregnancy or the transmission of STDs. Abstinence is the only completely effective method. Methods Physical prevention (most effective) include vasectomy and tubal ligation. Vasectomy: the vas deferens connecting the testes with the urethra is cut and sealed to prevent the transport of sperm. Tubal ligation: the oviduct is cut and ends tied off to prevent eggs
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Unformatted text preview: from reaching the uterus. Oral contraceptives (birth control pills) usually contain a combination of hormones that prevent release of FSH and LH, inhibiting development of the follicle so that no oocytes are released. Time-release capsules (Norplant) can be implanted under the skin and offer long-term suppression of ovulation. RU-486, the so-called morning after pill, interferes with implantation of the blastula into the uterine wall. Its use as a contraceptive is very controversial. Barrier methods employ physical (condom, diaphragm) or chemical (spermacides) means to separate the sperm from the egg. Male condoms are fitted over the erect penis; female condoms are placed inside the vagina. Only latex condoms prevent the spread of STDs. Diaphragms cap the cervix and block passage of the sperm into the uterus. Spermicidal jellies or foams kill sperm on contact and must be placed in the vagina prior to intercourse....
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This note was uploaded on 11/29/2011 for the course BIO BSC1010 taught by Professor Gwenhauner during the Fall '10 term at Broward College.

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Reproduction - from reaching the uterus. Oral...

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