A comparison of fetal cardiac functions as a function of asthma duration is shown in Table 3. We found that 12 years or more maternal asthma duration represented the top quartile of asthma duration. The asthma duration of 8 pregnant women with asthma was twelve years or more. The parameters of diastolic dysfunction such as mitral E wave velocity (p=0.031), mitral A wave velocity (p=0.013), tricuspid E wave velocity (p=0.034), and tricuspid A wave velocity (p=0.020) were significantly different between the pregnant women with asthma duration of 12 years and more compared to pregnant women with asthma of less than 12 years.