Ovary                  package:nlme                  R Documentation

Counts of Ovarian Follicles

Description:

     The 'Ovary' data frame has 308 rows and 3 columns.

Format:

     This data frame contains the following columns:

     Mare an ordered factor indicating the mare on which the
          measurement is made.

     Time time in the estrus cycle.  The data were recorded daily from
          3 days before ovulation until 3 days after the next
          ovulation. The measurement times for each mare are scaled so
          that the ovulations for each mare occur at times 0 and 1.

     follicles the number of ovarian follicles greater than 10 mm in
          diameter.


Details:

     Pierson and Ginther (1987) report on a study of the number of
     large ovarian follicles detected in different mares at several
     times in their estrus cycles.

Source:

     Pinheiro, J. C. and Bates, D. M. (2000), _Mixed-Effects Models in
     S and S-PLUS_, Springer, New York.  (Appendix A.18)

     Pierson, R. A. and Ginther, O. J. (1987), Follicular population
     dynamics during the estrus cycle of the mare, _Animal Reproduction
     Science_, *14*, 219-231.

