Use of
- Choose a calculation criterion if you know the beginning date of your last menstruation. The Last Menstrual Beginning (LMP) If you know the mode, ovulation day or procedure date, etc. Replacement of day. Choose the mode.
- Select the date in the month.
- If you are in LMP mode, enter your average menstrual cycle. If you don’t know, leave the default for 28 days.
- to calculate Press the button to show the scheduled date of birth, the current number of pregnancies, the trimester, the remaining number of days and the main mileage date.
Early birth calculation.
Date of birth calculation. The Law of NaegeleIn addition to 280 days (40 weeks) to the date of the last menstrual cycle, it is also widely known as the summary formula, "the date of the last menstrual cycle + 1 year − 3 months + 7 days". Based on the date of the menstrual cycle, 266 days (38 weeks) are added to the date of the menstrual cycle. Both methods result in the same 40-week period of pregnancy, with the difference only in whether the starting point is the date of the menstrual cycle or the time of the summary.
| by calculator | Officially | by VIGO |
|---|---|---|
| The Last Menstrual Beginning (LMP) | LMP + 280 days | Negle’s Law of 28 Days. |
| Replacement of day. | Up to 266 days. | If you know the time of correction (tests, procedures, etc.) |
| Give to Give. | Planned day + (cycle − 28) days | When the cycle differs from 28 days in LMP mode. |
How to Prevent Pregnancy Medically. Last week of pregnancy 0 days.That is to say, since the first day of the menstrual cycle before the correction occurs, the actual correction usually occurs in the 2 weeks of pregnancy. "pregnancy week nm" represents the number of days passed from the beginning of the last menstrual cycle divided by 7 parts (n weeks) and the rest (m days).
| Tagged as | The Period | specifically |
|---|---|---|
| Three minutes | 13 weeks pregnant. | Primary organ formation, regular periods of swelling. |
| Two Three Minutes | Pregnancy 14 to 27 weeks. | Relatively stable, starting to feel temper. |
| Three minutes | 28 weeks pregnant | Pregnancy, Preparation for Birth. |
Knowing good information.
The date does not mean “be born on that day.” It is known that the percentage of pregnancy is actually low on the scheduled day of birth, and most births take place within two weeks before the scheduled day. The regular mountain.Before 37 weeks is classified as premature pregnancy, and after 42 weeks is classified as premature pregnancy, so checking the “date to enter 37 weeks” together is much more helpful in preparing for birth than the scheduled date itself.
It may differ from the results of ultrasound measurements. If the menstrual cycle is irregular or the ovulation is delayed, there is a difference between the calculation of the menstrual day and the actual fetal growth. In hospitals, early pregnancy ultrasound measures the fetal head length (CRL) and so on, and it is common for these values to be adjusted by ultrasound, as opposed to the norm of the menstrual day. The menstrual cycle adjustment of this calculator is also near-value, so if there is a scheduled date in the hospital, use that date as a basis.
For example, if your last menstrual cycle starts on May 1, 2026 and your cycle starts on 28 days, the scheduled date will be February 5, 2027, which is 280 days later. If your cycle starts on 32 days, you will add 4 days to February 9, 2027 (near date).
The result of this calculator is a reference near-value according to the statistical formula and is not a medical diagnosis. Confirmation of pregnancy, confirmation of scheduled date, and judgment on the state of the fetus must be obtained through the consultation of the midwife and specialist.
Frequently asked questions.
Is the baby born on the exact date of birth?
No. The scheduled date of birth is only a statistical reference date, and the rate of births on the scheduled day is actually known to be low. Most of them occur within two weeks of the scheduled date (37-42 weeks of pregnancy), and they consider births between 37 weeks 0 and 41 weeks 6 as normal.
Why are pregnancies counted from the date of the last menstrual cycle rather than from the date of a relationship?
The exact date of ovulation and correction is difficult to know, but most of the date of the last menstrual period can be remembered.Medically, the date of the last menstrual period is calculated as 0 weeks of pregnancy, so the actual correction time is usually around 2 weeks of pregnancy.
My menstrual cycle is irregular, can I use this calculator?
The law of Negele presupposes a 28-day cycle, so if the cycle is irregular, the deviation can be larger. This calculator corrects the scheduled date as much as the difference is if the cycle is different from 28 days, but this is a near value. If the cycle is irregular, it is most accurate to calculate the scheduled date measured with ultrasound.
Which of the results is different from the scheduled in the hospital?
The scheduled date for measuring the fetal size by ultrasound in the hospital is a priority. Especially early pregnancy ultrasound is very accurate, and if the calculation of the date of birth differs from the calculation of the date of birth, the medical staff often adjust the scheduled date by ultrasound. Use the results of this calculator only as a reference.
What is the 37 week period?
Pregnancy from 37 weeks to 0 weeks is called regular pregnancy, and birth after this period is not considered premature pregnancy. On the contrary, birth before 37 weeks is classified as premature pregnancy, and after 42 weeks is classified as premature pregnancy, according to the judgment of the medical team.