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Contraception and Abortion Ch 7.docx

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Psychology 2075
Corey Isaacs

Contraception and Abortion 11/2/2012 10:36:00 AM Chapter 7 Contraception  Hormonal methods o Combination pill (oral contraceptives) – birth control pills that contain a combination of estrogen and progestin (progesterone)  Most traditional is 21-on, 7-off days  Pill mainly works by preventing ovulation  Failure rate – the pregnancy rate occurring using a particular contraceptive method, the percentage of women who will be pregnant after a year of use  If 5 women out of 100 get pregnant, the failure rate is 5%  Effectiveness – 100 minus the failure rate, with the previous facts, this pill would be 95% effective  Typical failures occur because of forgetting to take pills  Provides no protection against STD’s and STI’s  Can have interactions with prescription drugs (some drugs make the pill less effective)  Triphasic pill – a birth control pill containing s steady level of estrogen and three phases of progesterone, intended to mimic more closely women’s natural hormone cycles o The patch – contains the same hormones as pill but is administered transdermally, through the skin  Lasts for 7 days – patch is replaced each week with one patch free week o Vaginal ring – made of plastic and filled with the hormones as the pill, in lower doses  Ring is placed high up in the vagina and stays there for 21 days o Emergency contraception (EC) – available in pill forms for emergencies involving unprotected sex that might result in an unwanted pregnancy o Implants – thin rods containing progestin, inserted under the skin of a woman’s arm and are effective for 3 years o Depo-Provera injections – injections repeated every three months  IUD and IUS o Intrauterine device (IUD) – a plastic device sometimes containing metal or a hormone that is inserted into the uterus for contraceptive purposes o Works by preventing fertilization – produces changes in the uterus and fallopian tubes so sperm that reaches the uterus are immobilized and can’t move into the fallopian tube  Cervical caps o FemCap – a method of birth control involving a rubber cap that fits snugly over the cervix o Lea’s shield – a soft, pliable barrier contraceptive device that prevents sperm from entering the cervix o Blocks the entrance to the uterus so that sperm cannot swim up into it  Contraceptive sponge – a method made of polyurethane that contains a spermicide and is placed over the cervix  Common non-hormonal methods: o Condoms  Male condom – contraceptive sheath that is placed over the penis  Condom catches semen in order to prevent it from entering the vagina  Female condom – contains two rings, one is inserted in
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