Maternal characteristic | Secretor ( n  = 32) | Non-secretor ( n  = 12) |
---|---|---|
Maternal education | ||
  High school | 1 | 0 |
  Bachelor’s degree | 11 | 1 |
  Master’s degree | 12 | 7 |
  PhD or equivalent | 8 | 4 |
Maternal ethnicity | ||
  Caucasian | 29 | 10 |
  Asian | 1 | 1 |
  Hispanic | 2 | 1 |
Secretor genotypea | ||
  SS | 6 | 0 |
  Ss | 25 | 0 |
  ss | 0 | 12 |
Maternal blood type (ABO) | ||
  Type O | 15 | 6 |
  Type A | 15 | 5 |
  Type B | 1 | 1 |
  Type AB | 1 | 0 |
Maternal Rh factor | ||
  Positive | 29 | 9 |
  Negative | 3 | 3 |
Parity | ||
  Primiparous | 24 | 8 |
  Multiparous | 8 | 4 |
  Birth mode | ||
  Vaginal | 28 | 11 |
  C-section | 4 | 1 |
Infant gender | ||
  Female | 17 | 7 |
  Male | 15 | 5 |