Recently there have also been concerns raised about term infants. Merchant et al showed that mean oxygen saturations declined in both term and premature infants reaching a nadir of 95% after about 70 minutes of placement in a car safety seat with 8% noted to have an SaO2 of less than 90% for more than 20 minutes. Also, in an earlier study by Bass and Mehta, selected high risk full term infants were found to have increased risk of developing hypoxia.