You remember that time of pregnancy cannot be calculated accurately. Only women undergoing assisted reproduction methods can determine the exact time of conception. From there they can fairly accurately estimate time-based on their due date of conception.
However, for women who conceive naturally, you will not be able to know the exact time of sperm to fertilize an egg.
How to calculate your due date?
When fertilization occurs naturally, typically the due date is calculated based on the menstrual cycle of the mother rather than on the time of conception. Expected delivery time is usually calculated from the first day of your last period, and then adds 40 weeks. This is how the menstrual cycle when the mother has 28 days because it is expected that fertilization occurs in about 14 days after menstruation begins.
But not every woman has the exact 28-day menstrual cycle. Therefore, when calculating the expected birth time, you need to rely on the individual elements of each.
If a woman already applies measures of assisted reproduction, it can predict the time the baby is born much easier. That is because IVF identifies clearly the time of conception, the pace of development of the embryo and the exact moment when the embryo is implanted in the uterus. Besides, a different way as a pregnancy blood test that measures the amount of changing hormones of the mother.
Typically, a pregnancy lasts about 38-42 weeks. That is why the period of 40 weeks or 280 days are considered as “standard”. It is interesting that, although we all think pregnancy lasts for 9 months, and then calculated, it lasted nearly 10 months of the calendar. That’s because we start counting from the time pregnancy weeks LMP, rather than two weeks later, when conception has most likely happened.
Since generally refers to the expected time of birth is Estimated Date of confinement (EDC) or Estimated Date of Delivery (EDD) – translated as the expected time of birth.
Another way to expected date of birth of the baby is taking the first day of your last period minus 3 months, and then adds seven days too. For example, if the mother’s last menstrual period begins on 1/12, subtract 3 months plus 7 days, the due date will be 8/9. This is a way to calculate the 40 weeks of pregnancy.
How do I know when I become pregnant?
Sometimes it can calculate the time of conception if the husband and wife relationship occurs infrequently. For some families, such as soldiers, miners, usually, spouses live apart, the couple living discrete place. So if you remember the exact time of the relationship, you can estimate the time of conception is quite accurate.
But you remember, the calculation of birth date is still just a “conjecture” is not entirely accurate.
If you know the date of ovulation
While many women may know almost absolute certainty when they ovulate, they still cannot know the exact time of conception. Ovulation and fertilization do not occur at once, and conception does not take place immediately after sex. Sperm can live for up to five days while the time the fertilized egg may be short. The only fertilization occurs silently in the fallopian tubes. Not a woman can use to control consciousness fertilization.
However, some women still can recognize the moment when an embryo is formed in their uterus. Remember, this formation typically occurs a few days after conception takes place – not at the time you’re having sex or when eggs are fertilized. If a woman charting the menstrual period, temperature, and make sure the time of ovulation, they can estimate the time of conception easier.
Fertilization usually occurs over a period of 12-24 hours after ovulation. Therefore, most women will get pregnant within 11-21 days from the first day of your last period. How to know when a pregnancy ovulation
Another way to check the due date
Ultrasonography is an accurate way to check the growth of the fetus. Ultrasonic transducers can more accurately abdominal ultrasound. Many obstetricians have to use portable ultrasound technology in their consulting rooms.
Check the growth of the fetus. However, this is an incorrect way, because there is no “a General size” for all embryos. Some fetuses may grow, but some are smaller.
Compare to the size of the mother’s uterus to the classic data size during pregnancy. For example, at 12 weeks, the uterus usually begins sticking out of the pelvis and you can feel it in just above the pubic bone cling film. Approximately 20 weeks, the uterus can stretch to nearly touch the mother’s navel. However, this is also not true estimates entirely accurate.