Pregnancy is generally referred to as gestation. A gestational sac measuring 1.2cm by 1.0cm by 0.7cm may indicate a gestational age of 5 to 7 weeks, but this cannot be determined conclusively. Gestational age can also be estimated based on the menstrual cycle. After conception, the fertilized egg implants in the uterus and gradually develops. A gestational sac of 1.2cm by 1.0cm by 0.7cm suggests that it is not very large and may correspond to approximately 5 weeks of gestation. If fetal development is faster, it could also be 7 weeks, generally falling into the early stages of pregnancy. However, due to individual differences in constitution, the development of the gestational sac varies, making it impossible to determine the exact gestational age. Gestational age is typically calculated from the first day of the last menstrual period, with each 7 days constituting a week and each 4 weeks constituting a month. Therefore, estimating gestational age based on the menstrual cycle may be relatively accurate. In the early stages of pregnancy, the development of the gestational sac is not particularly stable, which can easily induce threatened abortion. Therefore, it is important to rest more, avoid vigorous exercise, and refrain from sexual activity. In the early stages, it is advisable to take folic acid as recommended by a doctor to prevent fetal neural tube defects.
