| Range |
51.45 + 0.3n - 0.5m %
|
| Organism |
Human Homo sapiens |
| Reference |
James WH. Sex ratio and the sex composition of the existing sibs. Ann Hum Genet. 1975 Jan38(3):371-8.PubMed ID1137352
|
| Primary Source |
Malinvaud, E. (1955). Relations entre la composition des familles et le taux de masculinite. Journal de la societe de Statistique de Paris, 96, 49. |
| Method |
Based on a study of 4 million births in France between 1946-1950 |
| Comments |
n is number of pre-existing boys and m is the number of pre-existing girls. Notice that ratio in population depends on viability rates that actually shifts ratio towards females. |
| Entered by |
Ron Milo - Admin |
| ID |
101075 |