Formula to calculate expected date of birth that mothers should know
No need for medical examination, you can calculate your baby's gestational age and due date yourself with a very simple formula.
Everyone thinks that pregnancy lasts 9 months and 10 days, but this is not an entirely accurate number.
Pregnancy duration also depends on many other factors such as fetal maturity, mother's menstrual cycle... Therefore, each person's expected date of birth is different.
 |
However, knowing the basic expected date of birth will help mothers prepare mentally to welcome their baby.
Formula for calculating expected date of birthThe due date is usually estimated based on a woman's last menstrual cycle (LMP). The baby's gestational age is usually 280 days from the first day of the LMP.
This formula will be calculated as follows:
- Determine the first day of your last menstrual period, then add 280 days.
- Determine the average length of your normal menstrual cycle.
+ Average cycle length is 28 days
+ If your menstrual cycle is <28 days, the expected date of birth will be subtracted by that many days.
+ If your menstrual cycle is >28 days, the expected date of birth will be increased by that many days.
For example: The first day of your last period was January 1:
- Plus 280 will be out on October 8.
+ If your menstrual cycle is 28 days, your due date will be October 8.
+ If your menstrual cycle is 26 days, your due date will be minus 2 days, which is October 6.
+ If your menstrual cycle is 30 days, your due date will be increased by 2 days, which is October 10.
The expected date of birth is the reference point.Normally, babies born between 37 and 42 weeks are considered moderate. If a baby is born before 37 weeks, it is considered premature, while after 42 weeks, it is considered late. Doctors may have to perform a cesarean section in these cases.
Signs that you are about to give birthUrinate more often:As you get closer to giving birth, your baby's head will drop lower, putting pressure on your pelvis and bladder, making you feel the need to urinate more often.
Strong and frequent contractions:As the due date approaches, contractions become more frequent, occurring every 5-10 minutes for 1-2 hours. These contractions will push the baby closer to the cervix to prepare for birth. At this point, you should go to the hospital immediately because the cervix is starting to open and the baby is about to be born.
Bleeding, vaginal discharge:As the uterus expands, more brown or red mucus flows down. It also makes the cervix softer and thinner to make it easier for the baby to pass through.
Water leaking or breaking:A baby developing in a woman's womb is surrounded by amniotic fluid. When this protective sac of fluid breaks, the baby is at risk of infection. Therefore, doctors recommend that you deliver your baby within 24-48 hours of your water breaking.
