To know exactly how many weeks you have and how many months you have, you need to calculate your gestational age, for which you only need to know the date of the last period (LMD) and trust a calendar the number of weeks that the current one has. Date.
Your doctor can also always determine your correct gestational age, the date suggested on the ultrasound done during your prenatal appointment, to accurately indicate how many weeks you’re pregnant and the estimated date of delivery.
- It is also possible to calculate gestational age by entering below on the first day of your last period.
- To know how many months you have.
- How many weeks of pregnancy it corresponds to.
- And on what day the baby is likely to be born:.
When a woman is unsure of the date of her last period, the safest way to know the number of weeks of pregnancy and the likely date of delivery is through an ultrasound or uterine height, which the doctor usually uses to calculate weeks and months. pregnancy. This takes into account the amount of Beta HCG in the blood and uterine height, after the 12th week of pregnancy, as well as an ultrasound requested by the gynecologist.
To calculate gestational age in weeks, write down the date of your last period on a calendar. Every 7 days, from that date, it will count as one more week of life for the baby.
For example, if the first day of the last menstrual period was March 11 and the pregnancy test result is positive, to know gestational age, you should start counting your pregnancy from the 1st day of your last menstrual period and not the day of your last menstrual period. Sex.
If on March 11, which was LMD, outside Tuesday, the following Monday the baby will have finished 7 days and gestational age continues to increase every 7 days, if today was Wednesday, April 16, the baby would have a gestational age of 5 weeks and 2 days, or 2 months of pregnancy.
The calculation is done this way because even if you may not yet be pregnant, it is very difficult to define exactly when fertilization took place, because sperm can survive up to 7 days in a woman’s body before fertilizing the egg and starting a pregnancy.
According to the Ministry of Health (2014), the determination of gestational age, the conversion from weeks to months, should be calculated as follows:
up to 4 and a half weeks pregnant
4 and a half to 9 weeks
10 to 13 and a half weeks of pregnancy
13 and a half weeks to 18 weeks of pregnancy
19 to 22 and a half weeks of pregnancy
23 to 27 weeks pregnant
28 to 31 and a half weeks of pregnancy
32 to 36 weeks pregnant
37 to 42 weeks pregnant
Pregnancy usually lasts 40 weeks, but the baby can be born between 39 and 41 weeks without any problems, however, if work does not start spontaneously until after 41 weeks, your doctor may choose to activate oxytocin work in your vein.
To calculate the likely due date, which should be about 40 weeks after the BOM, you must add 7 days to the BOM, then count 3 months back and then add a year.
This calculation does not give the exact date of delivery because the baby can be born between 37 and 42 weeks of pregnancy, however, the mother knows in advance the expected date of delivery.