I didn't even know that dogs menstruated, or estrated--make that "underwent estrus" or is it oestrus?.    From Wordnik.com.  [saigner - French Word-A-Day] Reference

I didn't even know that dogs menstruated, or estrated -- make that "underwent estrus" (or is it oestrus?).    From Wordnik.com.  [saigner - French Word-A-Day] Reference

Females usually experience a single oestrus period.    From Wordnik.com.  [PLoS ONE Alerts: New Articles] Reference

Towards the spring the larvæ of the oestrus attaining.    From Wordnik.com.  [Narrative of a Journey to the Shores of the Polar Sea, in the years 1819-20-21-22, Volume 2] Reference

#113 Thanks for the useful reference Hank on sheep oestrus.    From Wordnik.com.  [RealClimate] Reference

Was the lead cat on oestrus and were the followers her suitors?.    From Wordnik.com.  [doggdot.us] Reference

But oestrus, cycling, in ewes, is controlled by environmental factors.    From Wordnik.com.  [RealClimate] Reference

Then, the rank sum for each male was averaged on the number of oestrus females.    From Wordnik.com.  [PLoS ONE Alerts: New Articles] Reference

And the other big factor in ewes entering oestrus is day length, as pointed out.    From Wordnik.com.  [RealClimate] Reference

He would not write more verse, when the oestrus was not on him, but he must write.    From Wordnik.com.  [Milton] Reference

I may, for the oestrus of work is upon me -- for the first time this couple of years.    From Wordnik.com.  [Life and Letters of Thomas Henry Huxley — Volume 2] Reference

Boar contact should also be limited to prevent the onset of abnormal oestrus, she says.    From Wordnik.com.  [FWi - All News] Reference

Pregnancy was determined by a birth less than 22 months after the observed oestrus event.    From Wordnik.com.  [PLoS ONE Alerts: New Articles] Reference

Occurrence of oestrus events coincident with kin. doi: 10.1371/journal. pone.0010052.t001.    From Wordnik.com.  [PLoS ONE Alerts: New Articles] Reference

So it seems to be with him now, at least to me, the Impetus, the Lyrical oestrus, is gone.    From Wordnik.com.  [Letters of Edward FitzGerald in two volumes, Vol. 1] Reference

In particular, males can start roaming and visiting other groups in search of oestrus females.    From Wordnik.com.  [PLoS ONE Alerts: New Articles] Reference

The chi-square goodness of fit test was used to explore the distribution of false oestrus events.    From Wordnik.com.  [PLoS ONE Alerts: New Articles] Reference

If the last-born calf was dead, we presumed all oestrus events occurring after the death were genuine.    From Wordnik.com.  [PLoS ONE Alerts: New Articles] Reference

The 19 false oestrus events were all observed in different individuals, from 12 different family groups.    From Wordnik.com.  [PLoS ONE Alerts: New Articles] Reference

To prevent sows from developing lactational oestrus, it is essential sows are pushed, says pig technologist.    From Wordnik.com.  [FWi - All News] Reference

OESTRAL: An adjective to describe oestrus, the time when a female is 'on heat' and most likely to conceive.    From Wordnik.com.  [Home | Mail Online] Reference

"Keep boars away from farrowing paddock fence lines, as the stimulation can contribute to inducing oestrus.".    From Wordnik.com.  [FWi - All News] Reference

In the dog, however, the period of the oestrus cycle is about the as that of gestation -- namely, six months.    From Wordnik.com.  [Hormones and Heredity] Reference

When a male did not access to one oestrus female at all, the rank assigned to the male for that female was 0.    From Wordnik.com.  [PLoS ONE Alerts: New Articles] Reference

If a mare does not begin her oestrus cycle within 21 days of being served, it can be assumed she is pregnant.    From Wordnik.com.  [Horsetalk.co.nz Headlines] Reference

Some sheep breeds are more seasonal than others, and it is in the latter that you can stimulate oestrus by introducing the ram.    From Wordnik.com.  [RealClimate] Reference

This being so, then surely diurnal temperature effects will swamp any likely seasonal phenological progression in oestrus timing.    From Wordnik.com.  [RealClimate] Reference

If a female was nulliparous, we treated all observed oestrus events as genuine, because we have no means of determining otherwise.    From Wordnik.com.  [PLoS ONE Alerts: New Articles] Reference

At least four of the eight false oestrus events that did not coincide with any Coincident occurrence of real and false oestrus events.    From Wordnik.com.  [PLoS ONE Alerts: New Articles] Reference

And because sows coming into oestrus during lactation in a batch system are likely to be culled, it's important to prevent it occurring.    From Wordnik.com.  [FWi - All News] Reference

When the ovum or ova, not being fertilised, die the period of development is (usually) shortened and pro-oestrus or menstruation occurs.    From Wordnik.com.  [Hormones and Heredity] Reference

However, producers should ensure signs of oestrus during lactation are actually lactational oestrus and not "pseudo heats", says Mr Hawe.    From Wordnik.com.  [FWi - All News] Reference

In chimpanzees, low ranking males need to provide more grooming to oestrus females than high ranking males in order to gain female access.    From Wordnik.com.  [PLoS ONE Alerts: New Articles] Reference