Under normal circumstances, the menstrual cycle should be 28 days, but many female friends may experience irregular menstruation, which is also a very normal phenomenon. If female friends do not find any obvious discomfort in their bodies in daily life, it is recommended that they do not feel nervous or worried. But for many female friends who want to have children normally, this issue must not be ignored. How to calculate gestational age if there is irregular menstruation?
How to calculate gestational age for irregular menstruation
1. Fetal age. This method is commonly used in embryology. Starting from the first day of pregnancy, i.e. from the day of fertilization. Fertilization occurs within 12 hours after ovulation, and the entire fertilization process takes about 12 hours. Ovulation often occurs around 14 days before the next menstrual period. For women who are not suitable for conception, doctors will first recommend that they arrange sexual intercourse before and after ovulation to improve their fertility rate.
2. Pregnancy age. Starting from the first 14 days of pregnancy, which is the gestational age plus 14 days, expressed in weeks. For women with a menstrual cycle of 28 days, the first day of pregnancy is the first day of the last menstrual period (the most recent menstrual period).
3. Menstrual age. Calculated in weeks from the first day of the last menstrual period, without considering ovulation or pregnancy dates. If the menstrual cycle is irregular or there is no ovulation cycle and no menstrual flow, it is difficult to infer ovulation and conception time, and a woman's last menstrual period is meaningless.
What should I do if I can't calculate my last menstrual period
For this group of female friends, the gestational age can only be inferred based on the earliest ultrasound results, and the expected delivery date can be calculated based on the current gestational age. Of course, this requires women to undergo ultrasound as early as possible, so the results of gestational age will be more accurate.
Ultrasound measurement of gestational sac and embryonic head to hip length, observing the presence of normal pregnancy structures such as yolk sac and fetal heartbeat, combined with biochemical tests such as β - HCG, can provide more accurate pregnancy data, inform whether the pregnancy is developing normally, and infer gestational age.
When menstruation is consistent with ultrasound biochemical testing, in general, for girls with delayed ovulation or irregular menstruation, although the judgment of the last menstrual period may be misleading, as long as we can learn to monitor it appropriately, it generally will not affect the body and is also very helpful for pregnancy. However, if female friends have irregular menstruation, it is still important to take it seriously, as this situation may lead to abnormal pregnancy. It is recommended that everyone still pay attention to regulation.
