Читать книгу The Complete Book of Dog Breeding - Dan Rice - Страница 19

Using female hormones, it is fairly simple to chemically induce outward signs of normal estrus in bitches. Artificially producing a fertile estrus is quite another project. A great many research trials conducted over several decades have yielded inconclusive results. Some trials reported relatively consistent success using oral estrogens daily. Some of that work is difficult or impossible to reproduce in practice.

Other researchers in the past had relatively good and reproducible success using a series of injections of estrogens, lutenizing hormone (LH), and follicle stimulating hormone (FSH). Unfortunately, LH hormone is no longer commercially available.

Breeding chart, using averages for the species.