Presentation on theme: " Contraception: › Deliberate prevention of conception or impregnation through the use of various devices, agents, drugs, sexual practices, or surgical."— Presentation transcript:
Contraception: › Deliberate prevention of conception or impregnation through the use of various devices, agents, drugs, sexual practices, or surgical procedures. Post Partum Taboo: › Cultural belief that forbids sexual intercourse for a specified period of time after the birth of a child.
Historical Look: Two thousand years ago the Chinese inserted oil-soaked paper into the vagina to cover the cervix. In Oceania, moss plugs were used. Ancient Egyptians used crocodile dung and honey. Ancient Athens, women rubbed their cervix with an oil of cedar and an ointment of lead. Sixth Century Greek used a cervical cap made by cutting a pomegranate in half, scooping out the flesh of the fruit and then inserting it into the vagina prior to intercourse.
Historical Look: Contraceptive sponge in use in the 1800’s was soaked in a solution of quinine prior to insertion and had a string attached for easy removal. Diaphragm was invented in Roman soldiers reputedly made condoms from the muscles of dead enemies. Small intestines of animals, fish bladders, and lambskins were condoms also. 1564 a linen sheath was used as a condom and for protection of venereal disease. Two other ancient and widespread forms of contraception that are still practiced today are coitus interruptus and interfemoral coitus.
Coitus Interruptus: Sexual intercourse deliberately interrupted by withdrawal of the penis from the vagina prior to ejaculation. Secretions from the Cowper’s gland sometimes carry live sperm. Interfemoral Coitus: Sexual activity in which the male rubs his erect penis between the thighs of a woman without insertion into the vagina. No likely to result in conception, but It is possible that sperm deposited just outside the vagina could cause a pregnancy and this method offers not protection against sexually transmitted diseases.
Barrier methods of Birth Control: Conception occurs when a sperm fertilizes an ovum. The fertilized egg, then attaches to the wall of the uterus and develops into a viable fetus. There are two ways of preventing this event: › The sperm are blocked from reaching the egg. › Any eggs that have been fertilized by sperm are prevented from developing further.
Combination birth control pills (oral contraceptives): Loestrin and Ovcon contain estrogen and progestin. › Higher levels of estrogen inhibit FSH production, so the message to ovulate is never sent. › Higher levels of progestin keep cervical mucus very thick, making it difficult for sperm to get through. The use of combination pills is one of the most effective methods of birth control.
Varying levels of estrogen and progestin: › Most women do best with no more than 30 to 35 micrograms estrogen. Triphasic pill (Ortho Tri-Cyclen) - Three phases in progestin levels. Progestin-only pills (Micronor, Nor-Q-D, and Ovrette) - Also called mini-pills.
Serious side effects associated with use of the pill include: › Slight but significant increases in certain diseases of the circulatory system. › The pill may aggravate already existing cancers. › The amount of vaginal discharge and susceptibility to vaginitis increases. › About 20 percent of women report increased irritability and depression.
Pill, Patch and the Ring: The patch (Ortho Evra): › Contains the same hormones as combination birth control pills but is administered through the skin. The vaginal ring (NuvaRing): › Flexible, transparent ring made of plastic and filled with the same hormones as the combination pill but with slightly lower doses. Emergency contraception: › Available in pill form for such emergencies as rape or a condom breaking.
Injections: Depo-Provera (DMPA): › Progestin administered by injections. › It works by: Inhibiting ovulation. Thickening cervical mucus. Inhibiting growth of the endometrium. › More effective than the pill. › Must be repeated every three months for maximum effectiveness.
Intrauterine device ( IUD ): Small piece of plastic that is inserted into the uterus and remains in place until the woman wants to have it removed. Immobilizes sperm that reaches the uterus and prevents them from moving into the fallopian tube. Most common side effects are increased menstrual cramps, irregular bleeding, and increased menstrual flow.
Diaphragm: › Inserted into the vagina and fits snugly over the cervix. › A contraceptive cream or jelly must be applied. › Diaphragm blocks entrance to the uterus, while cream kills any sperm that gets past the barrier. › Failure rate of 20 percent due to improper use. Cervical cap: › Fits more snugly over the cervix than the diaphragm and should also be used with a spermicidal cream.
Condoms: (Male) A thin sheath that fits over the penis. › Widespread use for contraception and protection against diseases dates from about › Catches semen and prevents it from entering the vagina. › Perfect-user failure rate is about 3 percent. › Typical-user failure rate is about 18 percent. Many failures result from improper or inconsistent use. Condoms: (Female) One ring of the female condom is inserted into the vagina while the other is spread over the vaginal entrance. › Prevents sperm from entering the vagina and blocks the entrance to the uterus. › Perfect-user failure rate is 5 percent. › Typical-user failure rate is 21 percent.
Spermicides: Come in a tube or can along with a plastic applicator which is filled and inserted into the vagina. Applicator’s plunger pushes spermicide into the vagina near the cervix. Consists of chemicals that kill sperm and an inert base that blocks entrance to the cervix. Failure rates can be as high as 25 percent.
Withdrawal: Coitus interruptus (pulling out): › The most ancient form of birth control. › With a failure rate of around 19 percent it is not a very effective method. › Over long periods of time may contribute to sexual dysfunction in the man and woman.
Rhythm methods are the only form of “natural” birth control. They require abstaining from intercourse during the women’s fertile period. › Calendar method is based on the assumption that ovulation occurs about 14 days before the onset of menstruation. › In the standard days method ( SDM ), a woman who knows that she is regular, with a cycle length of between 26 and 32 days, abstains from days 8 to 19.
Basal body temperature method ( BBT ): Woman waits for her daily temperature to rise sharply on the day after ovulation. Intercourse would be safe beginning about three days after ovulation. › Additional rhythm methods are the cervical mucus method and the sympto-thermal method. › The typical failure rate of all rhythm methods is around 25 percent.
Sterilization: Voluntary surgical contraception (VSC) is a surgical procedure whereby an individual is made permanently sterile. › Vasectomy: The male sterilization operation. › Vasovasostomy : The surgical procedure to reverse a vasectomy. › Minilaparotomy/Laparoscopy: Two of several techniques used to sterilize a woman. In some cases it is possible to reverse female sterilization by using highly refined microsurgery techniques.
Attitudes toward Contraception: Attitudes and emotions play an important role in making a person more or less likely to use contraceptives effectively. › Erotophobes : Don’t discuss sex. Have sex lives that are influenced by guilt and fear of social disapproval. Have intercourse infrequently with few partners, and are shocked by sexually explicit films. › Erotophiles : Just the opposite and are more likely to be consistent, reliable contraceptive users.