Birth Control for Teens
One ob-gyn shares how she talks about birth control for teens, specifically about IUDs and implants. There are many excellent options of birth control for teens. As an ob-gyn, I often recommend that teens consider long-acting
What is the fertility awareness-based birth control method?
Fertility awareness-based birth control is knowing and recognizing when the fertile time (when a woman can get pregnant) occurs in the menstrual cycle. If you are practicing fertility awareness as a birth control method to prevent pregnancy, you need to avoid having sexual intercourse or use a barrier method of birth control, such as a condom, during the fertile period. If you are trying to get pregnant, you should have sexual intercourse on your fertile days, ideally every day or every other day.
What is a menstrual cycle?
A menstrual cycle is defined from the first day of menstrual bleeding (called day 1) of one menstrual period to the first day of menstrual bleeding of the next. An average menstrual cycle lasts 28 days.
In a normal menstrual cycle, an ovary releases an egg, a process called ovulation. In an average menstrual cycle of 28 days, ovulation occurs about 14 days before the start of the next menstrual period. The number of days between ovulation and the start of the menstrual period is the most consistent in a menstrual cycle. After the egg is released, it moves down the fallopian tube to the uterus.
When can I become pregnant?
An egg can survive in the fallopian tube for about 24 hours after ovulation. A man’s sperm can survive inside a woman’s body for about 3 days (and sometimes up to 5 days) after sexual intercourse. You can become pregnant if you have sex anywhere from 5 days before ovulation until 1 day after ovulation. Your chance of pregnancy is highest when live sperm are present in the fallopian tubes when ovulation occurs.
In a normal menstrual cycle, an ovary releases an egg, a process called ovulation. In an average menstrual cycle of 28 days, ovulation occurs about 14 days before the start of the next menstrual period. The number of days between ovulation and the start of the menstrual period is the most consistent in a menstrual cycle. After the egg is released, it moves down the fallopian tube to the uterus.
How effective is fertility awareness in preventing pregnancy?
When fertility awareness is used to prevent pregnancy, fewer than 1–5 women out of 100 will become pregnant during the first year of perfect use. Perfect use means using the method correctly and consistently throughout the menstrual cycle. With typical use—meaning that you use the method the way the average person does, which is sometimes incorrectly or inconsistently—pregnancy rates increase. In the first year of typical use, 12–24 women out of 100 will become pregnant.
What are the different types of fertility awareness-based birth control methods?
- Standard Days method
- Cervical mucous method
- Basal body temperature (BBT) method
- Symptothermal method
What is the Standard Days method?
The Standard Days method follows a standard rule of what days during the menstrual cycle are the most fertile. If your cycle is between 26 days and 32 days long, the Standard Days method considers days 8–19 to be the most fertile days. To prevent pregnancy, you should avoid having intercourse or use a barrier method of birth control on these days. To promote pregnancy, you should try to have intercourse between day 8 and day 19, either every day or every other day. The Standard Days method works best if your cycles are regular and are consistently between 26 days and 32 days long.
What is the cervical mucous method?
The cervical mucus method involves recognizing changes in the mucus produced by the cervix and in how the mucus looks and feels. Just before ovulation, the amount of mucus made by the cervix noticeably increases, and the mucus becomes thin and slippery. Just after ovulation, the amount of mucus decreases, and it becomes thicker and less noticeable. To prevent pregnancy, you should avoid sexual intercourse or use a barrier method of birth control from the time you first notice any cervical mucus. To promote pregnancy, you should have intercourse every day or every other day when the thin and slippery cervical mucus is present
When using methods that rely on cervical mucus, be aware of any changes in your health or daily routine that could make reading the signs of ovulation difficult. Medications, feminine hygiene products, douching, sexual intercourse, breastfeeding, or having a pelvic exam in which lubrication is used all can change how the cervical mucus appears.
What is the TwoDay method?
The TwoDay method is a variation of the cervical mucous method. With the TwoDay method, you check your cervical mucus at least twice a day and then ask yourself two questions:
Did I notice any secretions today?
Did I notice any secretions yesterday?
If you noticed cervical mucus today or yesterday, you most likely are fertile. To prevent pregnancy, you should avoid sexual intercourse or use a barrier method of birth control. To promote pregnancy, you should have sexual intercourse every day or every other day when you notice secretions. If you did not notice any cervical mucus today and yesterday (2 dry days in a row), pregnancy is less likely.
What is the basal body temperature method?
The BBT is your body’s temperature when you are fully at rest. In most women, the body’s normal temperature increases slightly during ovulation (0.5–1°F) and remains high until the end of the menstrual cycle. The most fertile days are the 2–3 days before this increase in temperature. To monitor your BBT, take your temperature every morning after waking up, before any activity, getting out of bed, or having anything to eat or drink. Record these temperatures daily.
BBT by itself is not a good way to prevent or promote pregnancy. It shows only when ovulation has already occurred, not when it is going to occur. Also, keep in mind that if you have a fever (for example, if you have an ongoing medical condition or if you get sick with the flu), the BBT method may not be reliable.
What is the symptothermal method?
The symptothermal method is a combination of methods. The two most commonly used are the BBT method and the cervical mucus method. The Marquette method combines BBT and cervical mucus tracking with use of an electronic hormonal fertility monitor. The monitor detects hormones in urine to confirm fertile days. It can be purchased online or at a pharmacy. Other methods or signs can be used, such as the Standard Days method, as a double check to identify when the fertile time begins and ends.
What are the advantages of using fertility awareness-based methods to prevent pregnancy?
They cost very little to use. Many women like the fact that fertility awareness is a form of birth control that does not involve the use of medications or devices.
What are the disadvantages of using fertility awareness-based methods to prevent pregnancy?
Using fertility awareness to prevent pregnancy does not protect against sexually transmitted infections (STIs), including human immunodeficiency virus (HIV). Fertility awareness-based methods may not be a good choice if you are at high risk of getting a sexually transmitted infection. These methods also need the cooperation of your male partner.
Where can I learn about using these methods?
If you are interested in using fertility awareness to prevent pregnancy, it may be best to learn the method from a qualified teacher or group. Your health care professional or your state or county health department may be able to provide you with information about where to find a teacher. Tools such as smart phone apps and web sites also are available to help you record information about your menstrual cycle and calculate your fertile periods.
Can anyone use these methods to prevent pregnancy?
There are some situations in which the use of fertility awareness-based methods to prevent pregnancy may be more difficult. If any of the following conditions apply to you, you may need extra training to make sure you are using fertility awareness correctly:
- You are approaching menopause.
- You have just started having menstrual periods.
- You have recently stopped using a hormonal birth control method or are using other drugs that can affect the signs of fertility.
- You have recently had a baby (you may want to delay using certain fertility awareness-based methods until your menstrual periods are regular).
Is there anyone for whom these methods are not recommended to prevent pregnancy?
These methods should be used with caution if you have any of the following:
- You are not able to avoid sex or use a barrier method during your fertile days.
- Pregnancy is not recommended for you because of medical risks.
- You have bleeding between menstrual periods that is difficult to distinguish from your normal menstrual period or that makes assessing your cervical mucus difficult.
Talk to your doctor to find out if fertility-awareness based birth control methods are right for you.
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