What's the ovulation and safety period? In the first half of this problem, the pre-pregnancy is more concerned; in the second half is the late stage of lazy cancer
In theory, the rest of the time after the ovulation period has been determined can be considered safe. So the question is how to determine the ovulation period. The method used to measure the ovulation period is more simple and more precise and more cumbersome。
Based on menstrual cycle
There is a need to pre-set this method for women who have to be menstruated。
The criteria for the regularity of menstruation are the interval between the first days of two menstruation periods, 21-35 days, or, if not, a doctor, which may be problematic. In addition, cycle fluctuations were modest, preferably 2-3 days, and could not exceed a maximum of 7 days。
Next, the ovulation period may be two to three days in advance of the 14-day countdown in anticipation of the next menstruation. If the cycle is 28 days, it can also run 14 days; if the cycle is not 28 days, it will not pass。
People who have learned mathematics in primary school can learn to calculate it without paying for it. However, the projected time error is relatively large, and there is a real risk that there will be no mature osteoporosis or that mature osteoporosis will not be released, such as the unbreakable osteoporosis syndrome (lufs)。
Base temperature test
Every morning, i wake up, i don't do anything, i take my temperature, and i record it as a curve. When changes in body temperature occur, it is generally possible to ovulate for about 1-2 days。
It's a bit of a problem to measure the temperature of the record body on a daily basis, and now there's a close temperature that will automatically help you record the completion of the base temperature curve。
In addition to knowing the time of ovulation, the base temperature helps you to determine the causes of menstruation, whether the ovarian function is normal or not, etc。
Utility test paper
From the tenth day of menstruation, it is measured once a day until it is positive. This is a test for the yellow form lh in urine, which is positive, and it can be predicted that there will be a mature egg bubble released in the next two days。
This approach can be done at home, which is a little more accurate than the first two, and it is more certain that there is a mature ovulation, but there is also a risk that it will not be released。
B super-monitoring ovulation
This is the most accurate method, starting with the 11th to 12th day of menstruation, with an interval of 1-2 days from the results of each test until the ovulation is seen. I just need to run to the hospital a lot。
Several notes on security period calculations
As we can see, there are a number of methods to detect ovulation periods, with the exception of b-plus, which are relatively different. Besides, i can't believe that people with late cancer who don't want to buy a condom or a combination of contraceptives, who don't want to use safe-time contraception, go to the hospital to make sure they ovulate
In addition, consideration needs to be given to the time during which the eggs and sperm are embedded in the body. In general, eggs can survive for 1-2 days in the fallow tube after discharge, and sperm can survive for a little longer than 2-3 days in the female body. Thus, three days before the ovulation period and two days after the ovulation period, there is an opportunity for pregnancy。
The method of combining ovulation tests is miscalculated and, if calculated on the basis of the menstruation cycle, there is a certain risk of fertilization from six days before the theoretical ovulation date to five days after. After a few days of menstruation, you've got about a week left to be truly safe from contraception。
Moreover, there may be additional ovulations during the so-called safe period. There is widespread failure of clinically safe contraceptive methods, ranging from 20 to 30 per cent。
Summary
If pregnancy is to occur, the above-mentioned method of monitoring ovulation can be tried
If you want to use contraception, use scientific contraception, and really love girls, don't be lazy。
