Ovuplant was withdrawn from the US market following issues with mares which did not become pregnant failing to return to estrus in a timely manner. Techniques were developed where the implant was removed 48 hours after implantation in the mare,  however compounded biorelease Deslorelin products were at the time available as well as more commonly used ovulation promoters such as hCG , which did not produce the same failure effect. Upon "Sucromate Equine" receiving FDA-approval, the compounded products were no longer legally available within the USA, however they remain available in Australia and New Zealand where an approved version is marketed.
I tend to agree with the commentator on their comment that “some believe the male GSD is more affectionate and easier to train and the female GSD is more aggressive and protective of its owners and puppies. Ironically most of the time its the other way around. The male is typically more aggressive and the female more affectionate and easier to train. Also males tend to be more protective over their surrounding area and the females more protective over the family and their pups.” The male looks at the whole picture – he scopes out the entire property (although he will still protect you individually), while the female tends to stick close by the den – she sticks close by the family and the pups. She may come across as aggressive because she is protecting her pups (and family), but the male is the one I really feel safer with if I were only to have 1 dog. He is the one with the force behind the bark. (But then again it also depends on the bloodlines too, but a “true” German shepherd – that hasn’t been washed out by all kinds of breeding, will be a “natural” enforcer behind his bark.) So a male is my pick if I could only have 1 dog, but I love them both.