When female friends go to the hospital for a physical examination after pregnancy, they will be asked a question, which is the specific time of the last menstrual period. After knowing the time of the last menstrual period before pregnancy, doctors can quickly calculate the expected delivery period of the pregnant woman based on this time. So, when does pregnancy start?
The commonly referred to "ten months of pregnancy" does not refer to 10 complete natural months, but rather 40 natural weeks. Pregnancy should be counted from the first day of a woman's last menstrual period, not from the time when the fertilized egg forms and implants. All women preparing for pregnancy must keep track of their menstrual periods for the convenience of doctors to calculate.
However, if a woman's menstrual cycle is irregular, the cycle time is not fixed, sometimes long and sometimes short, and if it is still calculated from the day of the last menstrual cycle, the actual number of days of conception may have a significant error compared to the calculated number of days. Therefore, it is necessary to use ultrasound to check the size of the fetus to calculate the gestational age and further confirm the expected due date.
After pregnancy, women must have a regular sleep schedule, avoid staying up late, and ensure sufficient rest time. Take frequent showers every day, and it is recommended to rinse the external genitalia with warm water to maintain cleanliness and hygiene of the private area. It is best not to perm or dye hair during pregnancy, use less or no cosmetics, and quit smoking and drinking.
