Patient's question:
Doctor,I plan to have a baby around October next year. Could you please tell me what time of year is most suitable for pregnancy? How is the due date calculated? Looking forward to your reply, thank you!
Doctor's answer:
Hello: The average number of days from ovulation and fertilization to fetal birth is 266 days. If a woman consistently measures her basal body temperature daily before pregnancy, she can determine the date of conception and thus calculate her estimated due date. However, for those who do not know when they ovulated and only know the date of their last menstrual period, we can estimate the due date based on this information.Traditional Calculation Method:
Subtract 3 from the month of the last menstrual period or add 9 (if the month is greater than 3, subtract 3; if the month is 3 or less, add 9), and add 7 to the day. For example: If the last menstrual period was on February 7, 1996, the calculation would be: February + 9 = November, 7 + 7 = 14. Thus, the estimated due date is November 14, 1996. If the last menstrual period was on June 17, 1996, the calculation would be: June - 3 = March, 17 + 7 = 24. The estimated due date would be March 24, 1997. If the last menstrual period was recorded in the lunar calendar, convert it to the Gregorian calendar for calculation.
Estimating the Due Date Based on Early Pregnancy Symptoms:
This method is generally used when a pregnant woman cannot remember the date of her last menstrual period, or in cases of pregnancy during lactation or postmenopausal pregnancy. Typically, pregnancy symptoms appear around 6 weeks after the last menstrual period. At this point, the estimated due date is calculated by adding 34 weeks to the day the early pregnancy symptoms appeared.
Estimating the Due Date Based on the Onset of Fetal Movement:
Generally, a pregnant woman can feel fetal movement between 18 and 20 weeks of pregnancy. Based on the onset of fetal movement,