Cycle

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Related to Estrus cycle: anestrous

Cycle

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They have multiple estrus cycles during one part of the year, which is called the ovulatory season; and is followed by an anestrous period for the rest of the year.
Determination of estrus cycle stage: Since menstrual disturbance is a typical clinical feature of PCOS women, estrous cycles were examined in all groups of mice by evaluating the cell types in vaginal smears.
The effect of Se on the plasma P4 concentration was assessed at each estrus cycle (Figure 5).
In female SDT fatty rats, gonadal abnormalities in the estrus cycle and histopathology were reported by Inaba et al.
Importantly, we should mention that in previous studies (Rodriguez et al., 2010, Experiment 1; Rodriguez et al., 2011a, Experiments 1 and 2a) where the procedure, experimental room, and triangular-shaped pool were the same as those used in the present set of experiments, we examined the possibility that the estrus cycle of females could influence their performance.
Female dogs are usually spayed around six months of age before their first estrus cycle. Allowing a female dog to go through a heat or to have a litter is not necessary before considering spaying.
Thus, considering sex-related influences in pain response and the effects elicited by the injection of formalin into deep tissues not yet been explored by metabolic parameters, the aim of this study is to compare metabolic and hormonal changes between males rats and females rats in proestrus and estrus cycle after painful stimulus by formalin into the masseter muscle.
The story the evidence from the paper seems to tell is that a high level of in utero exposure to MEHP causes female mice to have a shortened but more intense reproductive life, possibly because greater hormone levels induce an elevated number of follicles to release more eggs per estrus cycle. Their lifetime egg supply is therefore used up sooner and along the way their mammary glands end up significantly altered.
It is no coincidence that humans and gibbons, the only primates not subject to an estrus cycle, are also the only primates that practise monogamy.
Female pandas have a very short estrus cycle, or time in which they can get pregnant.