1 Use moderate intensity, which is sufficient to improve cardiovascular fitness, muscle strenght and flexibility. 2  Perform exercises regularly: cardiovascular exercise: 3 to 5 times per week, strenght training: 2 to 3 times per week.
The pregnancy starts from the first day of her last menstrual period. Normally 2 weeks before ovulation. An ultrasound is the most accurate way to determine pregnancy dates. So yes, she can be 6 weeks and 3 days pregnant even though you only met 5 weeks ago because two of those weeks were before conception.
The size of your baby is measured and this gives a fairly accurate account of the precise age of your fetus, although the gestational age of the baby becomes more evident later on. The ideal time to calculate gestational age is between the eight and 18th weeks of pregnancy. Women generally, but not always, conceive between the 11th and 21st day after their pregnancy. At least this holds true for women who have a regular cycle.