When should I give birth if I get pregnant on May Day? How to calculate the due date?

When should I give birth if I get pregnant on May Day? How to calculate the due date?
Introduction: It is difficult for every pregnant woman to accurately determine the time of conception. Therefore, medical regulations stipulate that the due date is calculated from the first day of the last menstrual period. The entire pregnancy period is 280 days, or 10 months of gestation. So when should you give birth if you get pregnant on May Day? How to calculate the due date? Let’s follow the editor to find out below! Whether May Day is a good day or not, the key is to look at the lunar calendar on that day, as well as information about the God of Wealth and the God of Happiness, the auspiciousness of the time, etc. Mr. Shui Mo can help you analyze it.

The calculation method for the expected date of delivery is:

Add 9 or subtract 3 to the month number of the last menstrual period and add 7 to the day of the last menstrual period. If the lunar calendar is used for calculation, the month is calculated in the same way, but 15 is added to the day. Example: The last menstrual period was February 1, 1985.
Date 1 + 7
Month 2 + 9
Expected date of birth: November 8 (1985)
Last menstrual period was April 15, 1985 Date 15 + 7
Month 4 - 3
Expected date of birth: January 22 (1986)
The height of the uterus is between the navel and the upper edge of the pubic bone (10 cm above the pubic symphysis); at the end of May of pregnancy, the fundus of the uterus is 2 horizontal fingers below the navel (16-17 cm above the pubic bone); at the end of June of pregnancy, the fundus of the uterus is level with the navel (19-20 cm above the pubic bone); at the end of July of pregnancy, the fundus of the uterus is three horizontal fingers above the navel (22-23 cm above the pubic bone); at the end of the eighth month of pregnancy, the xiphoid process of the fundus of the uterus is in the middle of the navel (24-25 cm above the pubic bone); at the end of September of pregnancy, the fundus of the uterus is 2 horizontal fingers below the xiphoid process (28-30 cm above the pubic bone).
The due date does not mean that the baby will definitely be born on this day. It is just an approximate time. Birth within two weeks before or after the due date is considered normal.

Other methods

Fetal movement in primiparas occurs around the 18th to 20th week of gestation. Multiparas, because of their experience, can feel fetal movement 2 weeks earlier than primiparas, that is, at the 16th to 18th week of gestation.
Therefore, the calculation formula is:
The expected date of delivery for a primipara = the date when fetal movement occurs + 20 weeks.
The expected date of delivery for a multiparous woman = the date of fetal movement + 22 weeks.
Through the above methods, pregnant women can calculate the date of their baby's birth by themselves. In addition, if the pregnant woman can not remember the time of her last menstrual period, has no early pregnancy reaction, and has not felt fetal movement, the doctor can use B-ultrasound and the height of the uterine fundus to help estimate the expected date of delivery.
The body temperature curve takes the last day of the low temperature segment of the basal body temperature curve as the ovulation day, and calculates backward from the ovulation day to 264-268 days, or add 38 weeks.
When performing an ultrasound examination, the doctor can estimate the gestational age and calculate the expected date of delivery by measuring the biparietal diameter, crown-rump length and femur length (this method is mostly used by doctors for diagnosis through ultrasound examination).
Morning sickness usually occurs at the 6th week of pregnancy, which is 42 days after the last menstrual period. Calculating backward from this to 280 days is the expected date of delivery.
Therefore, the calculation formula is:
Due date = date of onset of early pregnancy symptoms + 34 weeks.
If you cannot remember the date of your last menstrual period, you can roughly estimate your due date based on the height of the uterine fundus. At the end of the fourth month of pregnancy, the height of the uterus is between the navel and the upper edge of the pubic bone (10 cm above the pubic symphysis); at the end of the fifth month of pregnancy, the fundus of the uterus is 2 horizontal fingers below the navel (16-17 cm above the pubic bone); at the end of the sixth month of pregnancy, the fundus of the uterus is level with the navel (19-20 cm above the pubic bone); at the end of the seventh month of pregnancy, the fundus of the uterus is three horizontal fingers above the navel (22-23 cm above the pubic bone); at the end of the eighth month of pregnancy, the xiphoid process of the fundus of the uterus is in the middle of the navel (24-25 cm above the pubic bone); at the end of the ninth month of pregnancy, the fundus of the uterus is 2 horizontal fingers below the xiphoid process (28-30 cm above the pubic bone); at the end of the tenth month of pregnancy, the height of the fundus of the uterus returns to the height at the eighth month, but the abdominal circumference is larger than that at the eighth month.
Reverse menstrual calculation method This is the most common calculation method. Counting backwards based on 280 days (40 weeks), add 9 (or subtract 3) to the month of the day of the last menstrual period, and then add 7 to the date. For example: if the last menstrual period was on January 15th, then 1 plus 9 equals 10, 15 plus 7 equals 22, and the expected date of delivery is October 22nd. For example, if the last menstrual period was on September 25, then 9 minus 3 equals 6, 25 plus 7 equals 32, and the expected date of delivery is June 32, but June only has 30 days, so it can be calculated that it should be July 2. This reverse calculation is based on a 28-day menstrual cycle and must therefore be modified according to the length of the individual's menstrual cycle.
Pregnancy calendar calculation: Using a commercially available round or disc-shaped pregnancy calendar, you can calculate the number of weeks of pregnancy and the expected date of delivery by comparing it with the day the last menstrual period began. This method may differ from the reverse menstrual calculation method by 2 or 3 days.

According to the algorithm above, we can know that the expected date of delivery for May Day pregnancy is around February 8 of the following year.

Summary: The above is an analysis of when to give birth during the May Day pregnancy and how to calculate the expected date of delivery! You can learn more about it for reference! I hope this article can help you!

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