The World of Pregnancy

When Did I Get Pregnant?

When did I get pregnant? This is a question that all mothers have thought at least once at some point. Pregnancy represents a reason of joy for most new mothers. As soon as the big news are found out, the curiosity and desire to know more about the evolution of the baby starts. A lot of mothers are often asking themselves how many weeks of pregnancy they have or how they should calculate they age of their pregnancy.

The calculation of the pregnancy age is made in a few different ways. The age of the pregnancy can be a gestational age estimated since the moment of the conception or a chronological age estimated since the first day of the last menstrual cycle.

Typically, the gestational age is estimated starting with the moment of the sexual contact from which the fertilization resulted. The chronological age of the pregnancy is estimated since the first day of the last period, but when there are cases of menstruation during pregnancy, this sort of calculation isn`t useful.

When Did I Get Pregnant Based on Ultrasound?

A medical ultrasound (also known as ultrasonography or diagnostic sonography) is made in the 20th week of pregnancy, but it can be made even earlier, if there is more than one fetus or if you aren`t sure of your pregnancy.

  • The Gestational Age: you should count the weeks starting with the moment when the sexual contact has taken place;
  • The Chronological Age: you should count the weeks starting with the first day of the last period;
  • The Biometric Age: the fetal biometric parameters can reveal the ultrasound scan age.

What Day Did I Get Pregnant?

If questions like “How do I know when I got pregnant?” pop up in your mind, you can calculate your due date by taking in consideration your first day of the last menstrual period, but for this to happen you generally need to have a regular period of 28 days. From that day you`ll need to add 9 months and 10 days (by European calculation) or 9 months and 7 days (by American calculation).

A normal pregnancy is considered the one with the duration of 37 to 42 weeks. Along with the estimation of the gestational age there are also some required tests that should be made, such as urinalysis, HIV, Torch system, VDRL and a complete blood count.

In any case, the percentage of women who give birth in the same day as the calculated due date is very small. However, it`s important for you to give birth anywhere around 37 to 42 weeks and not necessarily to give birth on the calculated due date.

The conception date can also be found if we know the age of the pregnancy in months which can be counted as it follows:

  • 1st month – 1-4 weeks;
  • 2nd month – 5-8 weeks;
  • 3rd month – 9-13 weeks;
  • 4th month – 14-17 weeks;
  • 5th month – 18-22 weeks;
  • 6th month – 23-27 weeks;
  • 7th month – 28-31 weeks;
  • 8th month – 32-35 weeks;
  • 9th month – 36-40 weeks;

When There`s a Period over the Pregnancy

If the period still appears even you are sure you`re pregnant, then it`s harder to calculate the gestational age based on the menstrual cycles and, in this case, you should take into account the pregnancy`s age established by ultrasound. Depending on the device and the experience of the doctor, some small differences of appreciation of around 2 weeks may exist.

It`s important to determine the dynamic ultrasound assessment if you want to establish the gestational age in such a case. This offers data even in cases of menstruation during pregnancy.

Talk to the doctor if you have any concern regarding the difference between the gestational, chronological or biometrical age, if they exist.

How Many Weeks Does a Normal Pregnancy Have?

Normally, a pregnancy has 40 weeks. However, the pregnancy is at term between the 38 and 42 weeks. A birth that takes takes place before the 38th week is considered a premature birth, and one that takes place after the 42nd week is considered a postterm pregnancy.

Premature Birth

A newborn is considered to be born prematurely when the birth takes place between weeks 24 and 38. Chances of survival before the week 24 are very little, but they increase with the age of the pregnancy. The risk in such situations is for the baby not to be fully developed so he is able to survive life outside the womb, reason for which doctors take special measures.

The vital signs of premature babies are monitored and the little ones are kept in incubators. They are fed artificially, intravenously and they are helped to breath by connecting them to medical devices.

Postterm Birth

The newborn is considered postmature if the birth takes place after 42 weeks of pregnancy. Still, there are a lot of doctors who want to eliminate any kind of risk and after 41 weeks they recommend Caesarean birth.

In case of a postterm pregnancy, the risk of death is higher. The lesions that occur in the placenta in this case decrease the blood supply to the fetus and may appear fetal hypoxia, meaning lack of oxygen in the brain.

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Still, How to Calculate Conception Date?

Because most pregnant women don`t really know the way the gestational age is calculated, they are confused most of the times when they get this information from the gynecologist.

The age of the pregnancy is simple to calculate because it starts with the first day of the last period, and it`s expressed in the weeks that passed since then until present, also known as weeks of amenorrhea (how many weeks passed since the period never came.)when did I get pregnant exactly

The total duration of the pregnancy is of 40 weeks of amenorrhea. Keep in mind that a month has only 4 weeks (28, 30 or 31 days). So, don`t split the age of the pregnancy, calculated in weeks at 4 until finding out the months of pregnancy because you`ll get wrong results.

Here`s how the calculation is actually made:

At the date of the last period it`s added the number 10 which represents an average value of the moment in which the ovulation takes places – when the woman can get pregnant. From the obtained number it`s calculated the weeks until the present time, so you`ll get the number of the week in which you are pregnant. Without forgetting to add the initial 10 days to the date of the last period, we`ll also find out the probably due date by counting 9 months from the date just found.

If even after reading the above information you still ask yourself “When did I get pregnant?”, maybe it`s best to get in touch with your gynecologist. He`ll be the only one who can clear things out for you.

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