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.
These markers are used to measure the gestational sac and the length between the crown (head) and rump. If the ultrasound is performed after the 6th week gestation, the length of the fetus from crown to rump is added to 6 weeks to determine gestational age. For instance, if the crown rump measurement is 21 mm, the gestational age of the fetus is 9 weeks. (6 weeks plus 21 days = 9 weeks.) If an ultrasound is performed before the 6th week gestation, age is determined based on other factors, including size of the fetus and development of the gestational sac.