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 best way to assess gestational age is with antenatal ultrasonography and menstrual history. Clinicians also estimate gestational age during the newborn physical examination (see The First Few Hours) using the new Ballard score (see Figure: Assessment of gestational ageânew Ballard score.).