Rates of uninsured increased from 3.8 % during pregnancy and delivery ( n = 87 of 2317 ) to 10.8 % at the first postpartum visit ( n = 253 of 2343 ) and 13.7 % at any subsequent visit to the practice after 2 months post partum ( n = 226 of 1646 ) ( P < .001 , both comparisons vs baseline ) .