Lots of Bachelors in Korea Can‘t Find and Won’t Be Able to Find Korean Girls to Marry [Dudley Poston - HIC]
In most countries of the world, 105 to 107 boys are born every year per 100 girls. A sex ratio at birth (SRB) of 105 to 107 is a near biological universal, with a narrow band of variability. The sex of a child is a random event, with an approximate 0.513 probability of being a boy. An SRB of 105-107