Unfortunately, it is impossible to calculate the exact date of delivery. Too many factors affect the day a baby is born. But parents can always find out the approximate date of birth and the error, in the absence of pathologies, will be small.
In medicine, there is a term applied to the timing of pregnancy - the estimated date of birth (PDD). When expectant mothers come to the antenatal clinic for the first pregnancy check-up and register, the doctor makes calculations and tells the woman the approximate day of birth.
He focuses on the date of the last menstruation, which every woman needs to know. The gynecologist will definitely ask the patient what date they started and how long they lasted.
If the menstrual cycle in the expectant mother is regular (once every 28 days), the doctor adds 14 days to the number of the beginning of menstruation and gets the approximate date of conception. The maturation and release of the female egg, that is, ovulation, occurs at this particular time.
Women need to mark the exact dates of the onset of menstruation in a desktop or small calendar all the time, this can be useful both during pregnancy and when contacting a gynecologist for advice.
Sperm can fertilize an egg immediately on the day of ovulation, and maybe after 1-3 days. Therefore, the exact date of conception today can only be said by a doctor doing an ultrasound scan.
If the pregnancy lasts no more than 12 weeks, the doctor can give a fairly accurate date of conception. At a later date, this is more difficult to do. Therefore, it is important for the expectant mother to undergo an ultrasound scan in the first weeks of pregnancy.
After the ultrasound examination, the doctor will add 28 weeks or 266 days to the figure in the colleague's conclusion, plus another 14 days that have passed from the last date of the onset of menstruation to ovulation, and will receive a check digit. She is reported to the pregnant woman as the date of the long-awaited event.
The birth of a baby is always a joy, but this joy appears under different circumstances. The child may be born earlier than the term named by the doctor, or it may linger in the mother's stomach for various reasons.
Women who have suffered from severe infections or suffering from endocrine diseases are underbearing.
A full-term pregnancy is between 38 and 42 weeks. If a woman walks for more than 42 weeks, then this is a post-term pregnancy. The timing can be influenced by the state of health of the mother, her nutrition and environment, as well as the peculiarities of the intrauterine development of the child.
The well-known Negele formula is also used to calculate the date of birth. According to it, you need to add 9 months to the last date of the onset of menstruation and then add another 7 days.
On the day of the first fetal movement, you can also approximately calculate the date of birth of the child. To it you need to add 20 weeks if the pregnancy is the first and 18 weeks if the second. The error will be about 2 weeks, which is quite a lot compared to the date said after the ultrasound, for example.
So the expectant mother can calculate the date of birth on her own, but she will still be assumed, as the obstetricians and gynecologists say. Doctors advise to worry more not about the exact day when the baby will be born, but about how to successfully carry the baby.
A healthy, optimistic mother will give birth well a day earlier and a few days later. The main thing is to have time to prepare for the desired event on time, and even the approximate date of birth will help this.
