Conception is the moment that marks the first day of pregnancy and happens when the sperm manages to fertilize the egg, starting the process of pregnancy.
While it’s an easy time to explain, trying to figure out what day it happened is quite difficult, as the woman usually doesn’t experience any symptoms and may have had unprotected intercourse on other days close to conception.
Thus, the date of conception is calculated with an interval of 10 days, which represents the period in which the egg should have been fertilized.
There are three main ways to calculate the conception period:
1. Through the last period
To find out which days you might have gotten pregnant, enter the date of the first day of your last period:
Conception usually takes place 11 to 21 days after the first day of your last period. Thus, if a woman knows the first day of her last period, she can estimate a 10-day period in which conception may have taken place. For this, just add 11 and 21 days to the first day of the last period.
For example, if the last period appeared on March 5th, it means conception must have happened between March 16th and March 26th.
2. Through estimated delivery date
This technique is similar to calculating the date of the last period and is used especially by women who cannot remember when the first day of their last period was. Thus, using the date estimated by the doctor for the birth, it is possible to find out when the first day of the last period may have been and then calculate the time interval for conception.
Generally, the doctor estimates the delivery to be 40 weeks after the first day of the last period, so if you take those 40 weeks off the probable date of delivery, the date of the first day of the last period before the period is taken. pregnancy. With this information, it is then possible to calculate the 10-day period for conception by adding 11 to 21 days to that date.
Thus, in the case of a woman whose birth date is November 10th, for example, 40 weeks should be taken off to find out the possible first day of her last period, which in this case will be February 3rd. To that day, you must now add the 11 and 21 days to find the 10 day gap for conception, which would then have been between the 14th and 24th of February.
3. Through gestational age
To know the date of conception from the gestational age, it is necessary to count backwards. In other words, in the case of being 20 weeks pregnant on November 15th, for example, by subtracting 20 weeks, it is possible to verify that the date of the last period was on June 28th.