On the average, males have a slightly higher hematocrit than females.

Hematocrit

refers to the proportion of blood volume that is occupied by red blood cells, a measure important in diagnosing and treating various conditions.

Males

Referring to the sex that produces small, mobile gametes (such as sperm in humans) which fertilize the larger gametes produced by females.

Females

Individuals of a species that are typically characterized by two X chromosomes, capable of producing eggs, and in many species can carry offspring through pregnancy and childbirth.