Observations on all births (23,970) in Birmingham, 1947. II. Birth weight.

Observations previously published on the duration of gestation (Gibson and McKeown, 1950) and birth weight (McKeown and Gibson, 1951) lend themselves to an examination of the association between these variables and foetal mortality. Data available for single births in Birmingham during 1947 are exhibited in Table I, separately for stillbirths, first-year deaths, and births which survived to the end of the first year of life. We have previously discussed the representativeness of these records, and need here note only that there are no conspicuous differences between the proportions complete in each of the three classes.