Surely, you are wondering when your future baby will already be born.
Fortunately, it is still possible to calculate the PDR. For this you can resort to some tricks. All you need is a calendar and a desire to know the date as soon as possible.
By the day of ovulation
The most likely date of conception is during ovulation or a couple of days before it. Ovulation occurs during normal functioning of the body on the 14-15th days of the cycle. If, for example, the cycle lasts 28 days, then ovulation falls on the 14th day. Add 280 days to this day - this will be the PDR.
On the day of conception
If you know exactly the date of conception of a child, it will not be difficult for you to calculate his possible date of birth. The period of fertility (the highest probability of conception) is favorable for sexual intercourse and conception. A sperm can search for an egg for fertilization up to 5 days. Given these numbers, add 280 days to get an approximate due date.Last menstruation
There is the Negele formula, which allows, together with the gynecologist, to calculate the approximate date of birth based on the last menstruation. But this system only works if you have a regular and stable cycle that runs like clockwork. From the first day of the last menstruation, take 3 months and add 7 days.
Ultrasound
The gynecologist will be able to tell you some approximate date of birth based on an ultrasound scan only after 12 weeks of pregnancy. It is during this period that the size of the fetus can tell about the date of birth.
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