How to calculate the most accurate ovulation period in 36 days of menstruation? When did ovulation come on the 22nd of last month?

The normal menstrual cycle is 28 days. If our menstrual cycle is different from the normal menstrual cycle, it is basically the same. Therefore, ovulation period and safe period can be calculated by normal methods. So, how to calculate the ovulation period of 35 days during menstruation?

How to calculate ovulation period of 36 days?

1, menstrual inference method

(1) Suitable for women with normal menstruation.

Women's ovulation date is generally around 14 days before the next menstruation. The ovulation date is calculated from 1 day of the next menstrual period, and from the countdown to 14 day or negative 14 day. The ovulation date, the first 5 days and the last 4 days are called ovulation period together. For example, anonymous's menstrual cycle is 28 days, and the 1 day of this menstrual cramp is 65438+February 2nd, so the next menstrual cramp is 65438+February 30th (65438+February 2nd plus 28 days), and then subtract14th day from 65438+February 30th, then Ovulation day, the first 5 days and the last 4 days, that is, 65438+February 1 1-20, is the ovulation period. For women with regular menstruation, ovulation calculator is more accurate in calculating ovulation period.

(2) For women with irregular menstruation

You can try to use the calculation formula of ovulation period: the first day of ovulation period = the shortest menstrual cycle days MINUS 18 days; The last day of ovulation = the longest menstrual cycle minus 1 1 day.

For example, if the shortest menstrual period is 28 days and the longest is 37 days, you need to subtract18 (28-18 =10) from the shortest holiday and11(37-/kloc-) from the longest holiday.

If women's menstrual cycle is irregular and menstruation is often delayed or advanced, then the calculated ovulation period will still be biased. And because women's ovulation day will be affected by external conditions, the most accurate way for women with irregular menstruation is to go to the hospital to monitor ovulation, so as to accurately grasp the ovulation period.

2.b-ultrasound monitoring method

B-ultrasound monitoring ovulation is to observe whether women ovulate through B-ultrasound. When the follicle diameter is ≥ 18mm, it means that the follicle is mature and ovulation is possible at any time. The average diameter of follicles on the day before ovulation was 21-22 mm.

Ovulation marks are: follicular disappearance or shrinkage; There is a 3- 10mm fluid dark area in uterus and rectal fossa; The edge of hair follicle is blurred, there are sparse light spots inside, and sometimes hematoma can be seen. If the light spots are dense, a light mass is formed, which is the corpus luteum.

Among all the methods for measuring ovulation, the most accurate one is B-ultrasound monitoring, which can not only measure whether there are dominant follicles in both ovaries, but also measure the size of dominant follicles and the thickness of endometrium. In addition, this method can also help to predict ovulation and guide pregnancy and sexual life to a certain extent.

3. Ovulation test paper self-test method

Ovulation test paper can predict ovulation by detecting the peak level of luteinizing hormone (LH). Within 24-48 hours before ovulation, there will be a peak of luteinizing hormone (LH) in urine, which is positive by self-examination with ovulation test paper.

(1) has two purple lines, and the color of the lower line is obviously lighter than that of the upper line, indicating that ovulation is about to happen, and the test must be continued every day.

(2) There are two purple lines, the upper and lower lines are basically the same color, or the lower line is darker than the upper line, indicating that ovulation will occur within 24-48 hours.

(3) Only one purple line appears, indicating anovulation.

The specific detection method is generally described on the packaging of ovulation test paper (be sure to operate strictly according to the instructions to minimize the error). Different from early pregnancy test paper, morning urine should not be used, and urine samples should be used at the same time every day as far as possible, and the amount of drinking water should be reduced 2 hours before taking urine, because diluted urine samples will also hinder the detection of LH peak. Then for the regular menstrual cycle, it should be measured before menstruation 14 days (that is, the expected ovulation time), and three days after this time, for six consecutive days; If menstruation is irregular or abnormal, it is usually measured on the third day after menstruation is clean. Until the two bars on the test paper are as deep as each other or the second bar is deeper than the first bar, ovulation will occur within 24-48 hours. For other test results, please refer to the illustrations in the instruction manual.

Need to be reminded that this is a standard physiological phenomenon during ovulation. Although the test paper is easy to use, the accuracy is only about 75% due to the manufacturing process and the self-tester. In addition, the test results are not simply "yes" or "no". Some people may have strong yang for several days in a row, so they may ovulate (usually after the last day of strong yang) or not ovulate at all.

When was the ovulation period of menstruation on the 22nd of last month?

Although the menstrual cycle is relatively long, the ovulation period is usually about 14 days before the next menstrual cramp. Ovulation can be monitored with ovulation test paper every day from the first 15 day of menstruation to see if ovulation is normal. It is suggested that during pregnancy, both parties should relax, have regular sex, pay attention to rest and try not to stay up late.

Generally speaking, the ovulation day should be the first 14 day before the next menstrual cramp. Because your menstrual cycle is long, you can also consider using ovulation test paper or color Doppler ultrasound to monitor follicular development. Relatively speaking, the results of color Doppler ultrasound detection are more accurate. Generally speaking, ovulation test paper should be used two to three days after the end of menstrual bleeding period and tested once a day. Color Doppler ultrasound should be tested about five days after the end of menstrual bleeding period, and the time for the next examination should be decided according to the follicular development.