Ovary: Counts of Ovarian Follicles

In MEMSS: Data sets from Mixed-effects Models in S

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.

Examples

str(Ovary)

Example output

Loading required package: lme4
Loading required package: Matrix

Attaching package: 'MEMSS'

The following objects are masked from 'package:datasets':

    CO2, Orange, Theoph

'data.frame':	308 obs. of  3 variables:
 $ Mare     : Factor w/ 11 levels "1","10","11",..: 1 1 1 1 1 1 1 1 1 1 ...
 $ Time     : num  -0.1364 -0.0909 -0.0455 0 0.0455 ...
 $ follicles: num  20 15 19 16 13 10 12 14 13 20 ...

MEMSS documentation built on May 2, 2019, 5:50 p.m.