Re: How to raise heart rate naturally. If I were in your shoes I would keep looking for a diagnosis before looking for a symptom management solution. If the MDs are baffled, maybe a bodyworker, sports orthopedist, or physical therapist could help. It really does sound unpleasant.
After mating, sheep have a gestation period of around five months. Within a few days of the impending birth, ewes begin to behave differently. They may lie down and stand erratically, paw the ground, or otherwise act out of sync with normal flock patterns. A ewe's udder will quickly fill out, and her vulva will swell.
A cow carrying a calf a long time in one gestation is likely to do so in the next gestation. Some cows in this study had an average gestation period of 288 to 290 days, whereas others had a period of only 274 to 276 days, irrespective of the sex of the calf.