Female friends should be aware of the safe and dangerous periods. The safe period refers to the period during which women do not ovulate and generally do not conceive, while the dangerous period is the opposite, during which women ovulate and are more likely to conceive if they have sex. So, let's take a look at how the security period is calculated.
What is a safe period
As the name suggests, the safe period is the safe period for female sexual intercourse contraception. The safe period is divided into pre ovulation safe period and post ovulation safe period. The period from the day of clean menstruation to the day before the start of ovulation is the pre ovulation safe period, and the period from the first day after the end of ovulation to the day before the next menstrual period is the post ovulation safe period. A woman with a regular menstrual cycle has a stable ovulation time. Having sexual intercourse during the safe period to achieve contraception is called the safe period contraception method.
How to calculate the most accurate safe period
1. Calendar method. If the menstrual cycle is always accurate, ovulation may occur on the 14th day after menstruation. After the egg cells are discharged, they can survive for about 2-5 days, and sperm can survive for 1-3 days when they enter the female reproductive tract. Therefore, not having sexual intercourse 3-4 days before ovulation and 5-7 days after ovulation can avoid pregnancy.
2. Basal body temperature method. Basal body temperature refers to the body temperature of a healthy person after waking up in the morning, which is generally the lowest body temperature of the day. Women of normal reproductive age experience an immediate increase in body temperature after ovulation, which persists until the start of the next menstrual cycle. Using the pattern of changes in a woman's basal body temperature, identify her ovulation period and refrain from sexual intercourse for the first 3-4 days and the last 5-7 days.
3. Observation method for changes in vaginal secretions. Female vaginal secretions undergo regular changes during different stages of the menstrual cycle. During ovulation, there is an increasing amount of mucus, causing a moist sensation in the vagina. The mucus becomes clear and can stretch up to 10 centimeters in length. The last day this mucus lasts is usually the ovulation period. Do not engage in sexual intercourse for the first 3-4 days and the next 5-7 days.
The above are three methods for calculating the safe period. The most commonly used and simplest method is the calendar method, which is very convenient to calculate as long as you know the first day of your menstrual cycle. However, this calculation method may be incorrect because some women may experience premature or delayed ovulation, which can also affect accuracy.
