In order to respond to the national call for eugenics and child rearing, both husband and wife will undergo pre pregnancy examinations, and of course, doctors will inform both husband and wife of the specific examination items. After making a series of preparations for pregnancy, couples who choose to have sexual intercourse during the female ovulation period have a high chance of getting pregnant. But many people don't know when the pregnancy cycle starts?
The specific time of pregnancy is difficult to calculate because it is based on a woman's menstrual cycle and ovulation period. If a woman's menstrual and ovulation periods are normal, they usually start from the first day of her last menstrual period. If estimated based on the time of conception, the gestational age may differ by about two weeks.
The female pregnancy cycle is generally calculated from the first day of the last menstrual period. Women with a normal menstrual cycle calculate their pregnancy cycle and due date from the first day of the last menstrual period. The expected calculation is the month of the last menstrual cycle minus three or plus nine, and the date is the date of the menstrual cycle plus seven. During pregnancy, various examinations performed by women usually start from the first day of the last menstrual period and then check the number of weeks of pregnancy.
For women with menstrual disorders, the gestational age is estimated based on the size of the gestational sac during the first ultrasound examination, and then the normal delivery time is 37-40 weeks based on the first estimated gestational age. Pregnant women should have a check-up every four weeks during pregnancy and every week after 36 weeks of pregnancy. Prenatal examinations should be conducted according to the gestational age, and for high-risk pregnant women, the frequency of prenatal examinations should be increased.
