Abstract
Morphometric studies of uteri, ovary weights, and follicle diameters were carried out to investigate possible methodological applications. Size and anatomical appearance of the uterus varied with age and phase in the estrous cycle, both in parous and nulliparous females. The uterus thus may provide valuable information on reproductive status for known-aged animals. Weight of ovaries increased in young, but declined in old females, showing significant covariance with body weight in young and prime ages. Ovary weights increased from low levels shortly after parturition to a maximum towards the end of the gestation period. Ovaries containing a corpus luteum were heavier than those without. Compared to ovary weights, mean diameter of largest ovarian follicle varied in an opposite pattern during the yearly cycle. Maximum follicle diameter was largest in non-ovulated females. Weight of ovaries and follicle size appear to be of limited value as criteria in analysis of reproductive status and performance.
Highlights
Reproductive organs exhibit significant change in anatomical appearance and function over the lifetime of female individuals (McDonald, 1975; Nalbandov, 1976), providing a potential source of information on reproductive development and activity
As indicated by Valentincic (1958), the weight of the uterus in red deer may provide an easy way to assess if a female has given birth earlier or not
Variation in time of ovulation and uterine development relating to conception could make comparison between ovulated, nulliparous hinds and parous hinds unfeaseable and confounding. Within both nulliparous and parous females there is a clear difference in weight of uteri between ovulated and non-ovulated individuals in the age groups 1, 2, and 3 year old, and in parous hinds in 4 years and older, knowing the age and parous status of female sampled in autumn, it is possible to assess if that female has ovulated or not with reasonable confidence on the basis of weight of the trimmed uterus
Summary
Reproductive organs exhibit significant change in anatomical appearance and function over the lifetime of female individuals (McDonald, 1975; Nalbandov, 1976), providing a potential source of information on reproductive development and activity. The analysis of the ovaries included to reproductive tracts and ovaries from animals describing size and appearance of various luteal which have ovulated is limited. This applies structures and their regressing stages. - Information on lactational possible use of this organ as an additional sour- status and occurrence of a corpus rubrum (corpus ce of information on reproductive events, pri- albicans) as described by Valentincic (1958), marily revealed through analysis of ovaries. Factorial and covariate models for analysis of variance were used to examine the effects of month of sampling, age (categories, see below), previous parturition, and estrus, with body weight as a covariate, on the weight of uteri and ovaries and size of follicles. Relationships between dependent variables and factors such as age and time periods were examined with linear regression analysis
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