What is contraception?
Contraception, commonly known as birth control, is the adoption of preventive measures to avoid pregnancy. Contraception techniques prevent the sperm from fertilizing the egg (ovum) and forming a fetus in the uterus.
So-called “natural” methods rely on behavioral and scheduling changes in your sex life, predicated on exceptional self-control skills. For these reasons, behavioral methods of birth control are the least effective available, according to the U.S. Centers for Disease Control.
What is the importance of contraception?
Voluntary birth control has become globally significant with the rapid increase in population. Contraception helps prevent the risk of unsafe abortions due to unwanted pregnancies. Effective control over reproduction may also contribute to a woman’s physical and mental well-being, and her ability to pursue her personal goals.
What are the different types of contraception?
For centuries, people have tried various methods to avoid pregnancy after vaginal intercourse. For example, Egyptologists translated a vaginal pessary contraception recipe from 1850 BCE including crocodile dung and fermented dough. Contraception has evolved to be less dangerous and more effective since then, falling into five primary categories:
- Natural methods: These involve behavioral adaptations and periodic abstinence.
- Mechanical barriers: The use of physical barriers such as condoms to prevent the sperm from reaching the ovum.
- Hormonal methods: This technique involves the use of hormones by the woman to:
- Prevent the release of egg from the ovary.
- Thicken the mucus around the cervix to prevent sperm entry.
- Thin the uterus lining (endometrium) preventing the fertilized egg’s attachment to it.
- Intrauterine devices: Intrauterine devices are implanted inside the uterus and work by releasing small amounts of hormones or by triggering the immune system to make the environment hostile to the sperm and the fertilized egg.
- Permanent contraception: This method involves a minor surgical procedure to
- Sever the fallopian tubes in women to prevent the mature eggs from reaching the uterus.
- Sever the vas deferens in men to prevent the sperm from getting into the semen.
What are the natural contraception methods?
Natural contraception methods are perhaps the safest way of avoiding pregnancy, but involve periodic abstinence. It requires consistent self-control and some of the methods have a high failure rate. Advantages of natural contraception are:
- No need of any devices
- No costs
- No hormonal or surgical interference with the body
There are three types of natural contraception:
Coitus interruptus is the technique of withdrawing the penis from the vagina before ejaculation.
- Efficacy: Efficacy depends on the man’s capability to withdraw in time. Failure rates are approximately 4% in the first year with perfect use and 22% in typical use.
- Can be practiced any time.
- Theoretical reduction of the risk of transmission of sexually transmitted diseases (STDs)
- Disadvantages: It requires perfect awareness and enormous self-control.
Vaginal intercourse may not result in pregnancy for about six months after the birth of a child, while the mother breastfeeds the baby and is yet to start periods. This method of contraception requires:
Breastfeeding the baby in four-hour cycles during the day and six-hour cycles during the night.
Avoidance of other supplemental food and formula milk for the baby.
During lactation, the body naturally suppresses ovulation by reducing the levels of luteinizing hormone, which helps in egg maturation and release. The period of ovulation absence depends on the frequency and duration of breastfeeding, and the length of time after childbirth.
Efficacy: Failure rate is 0.5% with perfect use and 2% with typical use in the first 6 months after childbirth.
- Uterus involution (return to normal size) is rapid.
- Suppresses menstruation.
- Helps with postpartum weight loss.
- Time of fertility return is uncertain.
- Frequent breastfeeding without other supplements may be difficult.
- This method cannot be used if the mother has human immunodeficiency virus (HIV) infection.
Natural family planning
Natural family planning requires periodic abstinence from sexual intercourse during the woman’s fertile period, when ovulation occurs. The fertile period is calculated by three methods:
- Calendar method: Ovulation usually occurs 12 to 16 days before the next period. The abstinence period is 18 to 11 days before the forthcoming period, based on the assumption that the ovum and sperm are viable for 24 and 48 hours, respectively.
- Cervical mucus method: This method is an attempt to quantify the cervical mucus discharge, which increases during ovulation.
- Symptothermal method: The woman’s basal temperature is relatively lower before the egg matures and rises 0.2-0.5 C after ovulation. Temperature rise after ovulation indicates the end of fertility period.
A combination of the above three methods may be required to predict the fertility period, after first recording about six menstrual cycles to calculate the approximate ovulation time.
Efficacy: The failure rate in typical use is about 25%.
Advantages: For certain couples, this may be the only method available for cultural or religious reasons.
- Suitable only for women with regular and predictable cycles.
- Requires complete abstinence during ovulation.
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Barrier Methods of Birth Control Side Effects, Advantages, and Disadvantages
Many barrier methods of birth control are available for a man or woman, for example, the sponge, female and male condoms, diaphram, spermicides, male condoms, female condoms, contraceptive sponge, diaphragm, and cervical cap. Side effects, and efficacy (in preventing pregnancy) depends on the type of birth control used.
Birth Control OptionsBirth control is available in a variety of methods and types. The method of birth control varies from person to person, and their preferences to either become pregnant or not. Examples of barrier methods include barrier methods (sponge, spermicides, condoms), hormonal methods (pill, patch), surgical sterilization (tubal ligation, vasectomy), natural methods, and the morning-after pill. Side effects and risks of each birth control option should be reviewed before using any birth control method.
Choosing Your Birth Control MethodWhich birth control option is right for you? Discover birth control methods such as birth control pills, birth control shot, implant, patch and more. Learn about birth control side effects and effectiveness.
Birth Control Pill vs. Depo-Provera ShotBirth control pills (oral contraceptives) and the Depo-Provera shot are two hormonal methods of birth control. Both methods work by changing the hormone levels in your body, which prevents pregnancy, or conception. Differences between "the pill" and "the shot." Birth control pills are available as combination pills, which contain the hormones estrogen and progestin, or mini-pills that only contain progestin. In comparison to the Depo-Provera injection, which prevents pregnancy for three consecutive months. Both methods of birth control are very effective in preventing pregnancy. Both the combination pill (if you take them as directed) and shot are up to 99% effective in preventing pregnancy. While the mini-pill is only about 95% effective in preventing pregnancy. Both methods cause weight gain, and have other similar side effects like breast pain, soreness or tenderness, headaches, and mood changes. They may lead to decreased interest in sex in some women. There are differences between the other side effects of these methods (depending upon the method) that include breakthrough bleeding or spotting, acne, depression, fatigue, and weakness. Both oral contraceptives and the Depo-Provera shot have health risks associated with them, such as, heart attack, stroke, blood clots, and cervical cancer. Birth control pills appear to increase the risk of cervical cancer. Talk with your OB/GYN or other doctor or health care professional about which birth control method is right for you.
Birth Control Quiz: Test Your Medical IQWhat is the best form of birth control? Take this quiz to find out about hormonal, surgical, barrier, and natural methods!
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Hormonal Methods of Birth ControlThere are several different hormonal methods of birth control. The hormones can be estrogen and/or progesterone. The hormones can be taken by mouth, implanted into body tissue, absorbed from a patch on the skin, injected under the skin, or placed in the vagina. Common types of hormonal birth control include: "The Pill" (oral contraceptives), injection (Depo-Provera, Lunelle), the patch (Ortho-Evra), and the vaginal ring (Nuvaring).
IUD (Intrauterine Device for Birth Control)
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There are two types of IUDs 1) Intrauterine contraceptive device (IUCD) including the ParaGard, Copper 7, and Mini-7; and 2) Intrauterine system (IUS) including Progestasert and Mirena.
Side effects of the IUD include spotting, infection, infertility, pelvic inflammatory disease, and heavy menstrual bleeding. Risks and complications of the IUD are miscarriage, ectopic pregnancy, pelvic inflammatory disease, and increased menstrual bleeding.
mifepristoneMifepristone (Mifeprex) is a synthetic steroid used to terminate early pregnancy. The Korlym brand of mifepristone is a cortisol receptor blocker, used to manage and treat high blood glucose levels (hyperglycemia) in people with Cushing’s syndrome. Serious and sometimes fatal infections and bleeding occur very rarely. A failed pregnancy termination could cause birth defects. Common side effects include abdominal pain and cramping, uterine cramping, nausea, fatigue, headache, vomiting, diarrhea, dizziness, endometrial hypertrophy, low blood potassium (hypokalemia), joint pain (arthralgia), swelling of extremities (peripheral edema), and others.
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nonoxynol-9 vaginalNonoxynol-9 vaginal is a spermicide used vaginally as a gel, foam, insert, film, or sponge to prevent pregnancy, usually in combination with other modes of contraception. The rate of unintended pregnancies with the use of nonxynol-9 products is generally higher than with other methods of contraception. Common side effects of nonoxynol-9 vaginal include local reactions in the penis or vagina (burning, irritation, rash, itching) and allergic contact dermatitis. Do not use while on menstrual period or if breastfeeding.
Birth Control Pills (Oral Contraceptives)Birth control pills (oral contraceptives) are prescription medications that prevent pregnancy. Three combinations of birth control pills that contain progestin and estrogen are 1) monophasic, 2) biphasic, and 3) triphasic. Birth control pills may also be prescribed to reduce menstrual cramps or prevent anemia. Certain prescription medications may cause drug interactions. Some women experience various levels of side effects of birth control pills.
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