Showing papers by "Kenneth L. Campbell published in 1987"

Long ovarian cycles in women of highland New Guinea.

Abstract: Self-reported menstrual diaries were collected over a 10-week period from 36 women of a small tribal isolate in highland New Guinea known as the Gainj. All 36 subjects were healthy and were known from their serum hormone levels to be cycling; none was currently married lactating or using any form of contraception. A survival analysis of the menstrual data indicates that the median cycle length of these women is 36 days approximately 40% longer than the median estimated for a sample of US women matched with the Gainj subjects for gynecological age. The difference between the US and Gainj women is highly significant (logrank test statistic = 34.8 p . It thus appears that inter-population variation in human ovarian cycle length may be substantial. (authors)