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Another factor is due to the shortage of food stocks during winter as the insects are being driven away and as the result, bat hibernate in pregnant condition. [38] In pinnipeds, the purpose of delayed implantation is in order to increase survival chance of the young animals as the mother ensure that the neonates are born at an optimal season. [39]
In the 1980s, Australian researchers developed a laparoscopic insemination procedure which, combined with the use of progestogen and a pregnant mare's serum gonadotropin , yielded much higher success rates (50-80% or more), and has become the standard for artificial insemination of sheep in the 21st century.
[85] [87] A North American study analysing more than 1,000,000 hip and 250,000 elbow scans in dogs over the age of two found the German Shepherd Dog to have a rate of hip and elbow dysplasia to be 18.9% and 17.8% respectively. The German Shepherd had the 8th highest rate of hip dysplasia and 6th highest rate of elbow dysplasia. [88]
A pregnant lioness. In mammals , pregnancy is the period of reproduction during which a female carries one or more live offspring from implantation in the uterus through gestation . It begins when a fertilized zygote implants in the female's uterus , and ends once it leaves the uterus.
Equine chorionic gonadotropin (acronym given as eCG but not to be confused with ECG) is a gonadotropic hormone produced in the chorion of pregnant mares.Previously referred to as pregnant mare's serum gonadotropin (PMSG), the hormone is commonly used in concert with progestogen to induce ovulation in livestock prior to artificial insemination.
The Maremmano-Abruzzese Sheepdog (Italian: Cane da pastore maremmano-abruzzese), also known as the Maremmano, Maremma Sheepdog, or Abruzzese Sheepdog (Italian: pastore abruzzese), among other names, is an Italian breed of livestock guardian dog.
The breed was built on a mare base of all-purpose farm and carriage horses, today called the Alt-Oldenburger. The modern Oldenburg is managed by the Association of Breeders of the Oldenburger Horse , which enacts strict selection of breeding stock to ensure that each generation is better than the last.
The White Shepherd is a variety of the German Shepherd bred in the United States. Although white-coated German Shepherds have been known in Europe as early as 1882, in 1933 the breed standard was amended in their native Germany, banning white-coated dogs from registration.