Pregnancy lasting 9 months and 10 days is calculated by physicians on a weekly basis, not monthly. The main reason for this is that the first day of the last menstrual bleeding is considered the beginning of pregnancy. Therefore, expectant mothers sometimes have difficulty calculating the birthday they are eagerly anticipating. When exactly the pregnancy will result in birth; It may vary from person to person, depending on the age, weight, diet and duration of previous pregnancies, if any, of the expectant mother. The physician, who follows the health of the expectant mother throughout the pregnancy, informs the expectant mother about the possible date of birth as the time of delivery approaches. In order for the pregnancy, which is a complex and exciting process, to result in a healthy birth, it is extremely important for the expectant mother to eat healthy and to take nutrient, mineral and vitamin supplements when necessary. Under normal conditions, pregnancy lasts 40 weeks. Delivery between the 24th and 37th weeks is considered a premature birth. About 70% of all preterm births occur between 34 and 37 weeks. Births in these weeks are defined as late preterm births.
What is Pregnancy Calculator?
The pregnancy period that expectant mothers enjoy calculating takes 9 months and 10 days. However, most expectant mothers have difficulty in calculating the month or week of their pregnancy. The main reason for this is that it does not know which time period should be considered as the beginning of pregnancy. In order to calculate the period of pregnancy, which is an enjoyable process, it is wrong to use the date on which the expectant mother learned that she was pregnant. The time taken as a basis for calculating pregnancy should be the first day of the last menstrual bleeding. In fact, the reason why the first week when the expectant mother is not pregnant is determined as the international standard is that it is not clearly understood exactly what week of pregnancy it is. In other words, this period is accepted as the first week of pregnancy because not knowing exactly when the naturally fertilized egg is fertilized causes difficulty in calculating the pregnancy precisely. The first day of the last menstrual bleeding, which is accepted as the first day of the first week of pregnancy, is the day when the egg, which is the female reproductive cell that will be fertilized with sperm, first begins to form. In other words, the period considered as the first week of pregnancy is the week that the mother-to-be’s body prepares itself for possible pregnancy. The endometrium, or uterine wall, which has become thickened this week, is exfoliated by the effect of the progesterone hormone secreted, and it is expelled from the body vaginally with some blood. After this procedure, the uterus is renewed. Afterwards, some of the eggs in the ovarian reserve begin to mature. This cycle begins when the TRH hormone secreted by the hypothalamus in the brain stimulates the pituitary gland, another endocrine gland. The stimulated pituitary gland causes stimulation of the ovaries by secreting LH and FSH hormones. Thus, some of the eggs in the ovarian reserve begin to develop and mature. The healthiest of the developing eggs come out of the sac or follicle in which they are cracked and are thrown into the fallopian tubes. The follicle from which the egg comes out undertakes the release of the estrogen hormone in this process. Thanks to the estrogen that stimulates the uterus, the uterine wall thickens a little in order to facilitate the attachment of the egg to the uterus in the event of possible fertilization. The egg, which moves towards the uterus through the fallopian tubes, is fertilized when it encounters a sperm cell and forms the embryo. All this takes approximately 3 weeks. However, the mother’s suspicion of pregnancy takes the 4th and 5th weeks at the earliest. Calculation of pregnancy according to the date of the relationship is also extremely difficult. The reason for this is that it is not known whether the sperm cell fertilized the female egg during the day of intercourse. In other words, although the egg thrown into the fallopian tubes remains alive for 24 hours, the male reproductive cell sperm can remain alive in the female body for 3-4 days. Therefore, before the egg reaches the fallopian tubes, the sperm cell may be waiting for the egg to arrive.
How is pregnancy calculated?
Calculations can be made on a monthly, weekly or daily basis to calculate the possible birth date of the pregnancy or baby. Pregnancy lasts 280 days or 40 weeks in total. Although it is widely known that pregnancy lasts 9 months and 10 days, pregnancy is calculated on a weekly basis as a standard. The main reason for this is that weekly calculation is easier and the pregnancy process and the development of the baby in the womb can be followed more easily and clearly in this way. Therefore, the starting week of pregnancy is considered to be the first day of the last menstrual bleeding. Thanks to this date, the period of pregnancy can be understood precisely. Pregnancy calculation is one of the methods that expectant mothers use to calculate the birth date of their babies. In this case, the expectant mother can find out how long she is before the birth by calculating the week of pregnancy. Another easy way to calculate the baby’s date of birth is to subtract 3 months from the first day of the last menstrual period and add 7 days. For example, a person whose first day of the last menstrual period is February 5th can subtract 3 months from this date and add 7 days after finding November 5th to get the date of November 12th. In other words, it can be said that a person whose first day of menstrual bleeding is February 5th, will give birth on November 12th with the gestational week calculation method. Knowing the number of weeks of pregnancy is also a method used to find out the possible symptoms of the expectant mother and the precautions to take. It is important to know the date of the first day of the last menstrual bleeding for week-by-week pregnancy calculation. If the expectant mother does not know this date exactly, the calculation of the gestational week is made by ultrasound measurements. However, this measurement cannot be precise as the growth rate of the baby may differ from other babies. Another method used to calculate pregnancy is the pregnancy calculation chart:
• 4-5 weeks pregnancy, 1 month
• 8-9 weeks pregnant, 2 months
• 12-13 weeks pregnant, 3 months old
• 16-17 weeks pregnant, 4 months
• 20-21 weeks pregnancy, 5 months
• 24-25 weeks pregnant, 6 months
• 28-29 weeks pregnant, 7 months old
• 32-33 weeks pregnant, 8 months old
• 36 weeks pregnant, 9 months
• The end of the 40th week is considered as 9 months and 10 days.
How is the onset time of pregnancy calculated?
Female reproductive organs, which are stimulated by the release of LH and FSH hormones in the pituitary gland in the brain, ensure that the egg formed in the ovarian reserve matures and is released from the sac in the fallopian tubes. The egg can remain viable in the fallopian tubes for about 24 hours. However, the sperm cell can remain alive for 2-3 days in the same environment. Therefore, fertilization can occur on the day of ovulation, or pregnancy may occur as a result of sexual intercourse 2-3 days before ovulation. On the 8th day after fertilization, Beta HCG level increases in the blood level. Beta HCG, which leads to the continuous production of progesterone, increases exponentially continuously until 7 to 12 weeks of pregnancy. Beta HCG, which first increases in the blood level, is also seen in the urine. Thus, the expectant mother can learn that she is pregnant with blood or urinary tract tests. Month by month pregnancy calculation is difficult because the menstrual cycle takes 28 days. Therefore, it is much easier and healthier when pregnancy is calculated by week.