How to calculate gestational age if menstruation is irregular?

Generally speaking, if a woman's menstrual cycle is relatively accurate, the gestational age is easy to calculate if she is pregnant. However, for women with irregular menstruation, if the gestational age is still calculated based on the last menstrual period, the calculated gestational age and expected date of delivery are generally inaccurate. Therefore, if a woman with irregular menstruation wants to calculate the gestational age, it needs to be calculated through B-ultrasound. Don't worry too much.

The onset of pregnancy can be determined in several ways. One is to detect hormones produced by the newly formed placenta. Clinical urine and blood tests can detect pregnancy within 6-8 days after conception. Home urine tests usually take 12-15 days to be effective. Both methods can only detect pregnancy but not the date of conception. Pregnancy can also be confirmed by the interruption of menstruation. Interruption of menstruation precedes any early pregnancy symptoms. So, how to calculate the pregnancy cycle if the menstruation is irregular?

Since it is difficult for every pregnant woman to accurately determine the time of conception, medical regulations stipulate that the expected date of delivery is calculated from the first day of the last menstrual period. The entire pregnancy period is 280 days, or 10 months of gestation. The calculation method is to start from the first day of the last menstrual period, subtract 3 or add 9 to the month, and add 7 to the day. For example, if the first day of the last menstrual period is April 21, 2000 in the Gregorian calendar, the expected date of delivery should be January 28, 2001. If you only remember the first day of your last menstrual period on the lunar calendar, you should convert it to the solar calendar and then calculate the expected date of delivery. Pregnant women give birth between 38 and 42 weeks of gestation, which is considered full-term. Since the length of each woman's menstrual cycle is different, it is normal for the estimated due date to differ from the actual due date by 1 to 2 weeks. If you have irregular menstruation and cannot remember the date of your last menstrual period, you can ask your doctor to estimate the date based on the time when early pregnancy reactions began, the time when fetal movements began, the height of the uterine fundus measured by hand, and the length of the uterus measured by a ruler.

What is wrong with irregular menstruation?

Irregular sleeping and waking times every day can also lead to endocrine disorders, which will increase the chance of menstrual irregularities. Especially for people who often stay up late, not sleeping at night and sleeping for a long time during the day can easily cause adverse symptoms.

Excessive weight loss is also the main cause of irregular menstruation. Excessive weight loss will lead to insufficient nutrition of the body. Without sufficient fat and protein, hormones cannot be synthesized well, so menstruation is likely to be too little or amenorrhea may occur.

Emotions can also affect menstruation. Being under high stress and anxiety for a long time will damage the function of the hypothalamus, making it impossible to ovulate and secrete hormones normally, and problems such as irregular menstruation will occur.

Diseases such as uterine fibroids can also cause irregular menstruation. Symptoms include longer menstrual periods or heavier menstrual flow. It is very important to go to the hospital for examination in time so as not to delay the best treatment time.