This is a plain ASCII data file containing 650 lines.
The first 11 lines are comments describing the columns in the data file.
The remaining 639 lines are tab-delimited, and contain the following
columns:

ID = a (randomly-assigned) 3-digit number which identifies a woman

age = the woman's age in years, dithered by adding a random number
      drawn (independently for each woman) from a Gaussian distribution
      of mean 0 and standard deviation 1.5

BMI = the woman's BMI in kg/m^2, dithered by adding a random number
      drawn (independently for each woman) from a Gaussian distribution
      of mean 0 and standard deviation 1.5

Partnered = 1 if the woman has a male partner, 0 if she does not

SES = 1 for better-off, 2 for poorer

Cycle = 1 for her first cycle in this study, 2 for her 2nd cycle in this study

Ov_anov = 0 for a cycle ascribed as anovulatory,
          1 for a cycle ascribed as ovulatory,
          9 for an anomolous cycle

cycle_day = day of cycle, counting forward from 1 = first day of menses

revday = reverse cycle day, counting backwards from
         0 = first day of the following menses

ovulation_day = cycle day of ascribed ovulation, for an ovulatory cycle,
                or "Undefined" for an anovulatory or anomolous cycle

CRP = dried-blood-spot serum-equivalent CRP in mg/L

The randomly assigned ID and dithering are done to protect the study
participants' anonymity.  The dithering standard deviations are sufficiently
small so as to not significantly hamper statistical analyses.