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 most commonly used method to find out the sex of your baby is ultrasound or sonogram. This method is most accurate between 18-22 weeks. It is normally done at the fetal anatomy survey or mid-pregnancy ultrasound, done in the mid-second trimester. At this point it is usually easier to tell the sex of the baby.