To know exactly how many weeks of pregnancy you are and how many months it means, you should calculate the gestational age and for that you only need to know the last date of menstruation (FUM) and count in a calendar the number of weeks to date.
Your doctor may also always report the corrected gestational age, which is the suggested date on the ultrasound performed during your prenatal appointment, to indicate exactly how many weeks the woman is pregnant and what the likely date of delivery will be.
- It is also possible to calculate gestational age by indicating only the first day of your last menstrual period.
- To know how many months you have.
- How many weeks of pregnancy this means.
- And what day your baby is likely to be born:.
When a woman doesn’t know what her last rule was, the safest way to know how many weeks of pregnancy she is pregnant and what the likely date of delivery is by ultrasound or uterine height, which the doctor usually calculates in the weeks. months pregnant. This takes into account the amount of Beta HCG in the blood, the uterine height, after the 12th week of pregnancy and the ultrasound requested by the gynecologist.
See more tests done during pregnancy
To calculate gestational age in weeks, you must record the date of your last period in a calendar. Every 7 days, from that date, the baby will have one more week of life.
For example, if the first day of your last period was March 11 and the pregnancy test result is positive, to know the gestational age you should start counting the pregnancy from the first day of your last period and not the day of intercourse.
So, if March 11, which was DUM, was Tuesday, the following Monday completed 7 days and adds 7 of 7, if today is April 16, Wednesday, the baby has 5 weeks and 2 days gestation. , or 2 months pregnant.
The calculation is done because although the woman is not yet pregnant, it is very difficult to define exactly when fertilization took place, since sperm can survive up to 7 days in the woman’s body before fertilizing the egg and starting the pregnancy.
According to the Ministry of Health (2014) to know the gestational age, when converting weeks into months, it should be taken into account:
Pregnancy usually lasts 40 weeks, but the baby can be born between 39 and 41 weeks, without any problem. However, if work does not start spontaneously until the age of 41, your doctor may choose to start working with oxytocin in your vein.
See also what pregnancy looks like week after week
Para calcular a data provável do parto, que deverá ser por volta das 40 semanas depois da DUM, é necessário acrescentar 7 dias à DUM, depois contar 3 meses pra trás e depois colocar o ano seguinte.
For example, if the LMP was March 11, 2018, adding 7 days, the result is March 18, 2018, then decreases by 3 months, which means December 18, 2017 and adds an additional year. So, in this case, the scheduled delivery date is December 18, 2018.
This calculation does not give the exact date of birth of the baby because the baby may be born between 37 and 42 weeks gestation, however, the mother is already informed of the likely time of birth of the baby.
During each week of gestation, the baby grows about 1 to 2 cm and gains about 200 g, but in the third trimester it is easier to notice this rapid growth, because the fetus already has organs formed and his body begins to concentrate mainly to accumulate fattening and prepare for the time of birth.