Your best chances are within the first 24 hours after ovulation, but there is still a small chance two days after. So, honestly, if your ovulation really did occur on the 18th then your chances aren't that great because you would be past that 24 hour window, but I wouldn't say its impossible.
Cryptosporidiosis. Cryptosporidiosis is a parasitic disease that affects quail, pheasants, peafowl, waterfowl, chickens, turkeys, finches and psittacines (such as parrots). Cryptosporidia are poorly host-specific and can affect other animal species including humans, other mammals,...
Parrots. Psittacosis is a bacterial infection that affects birds, particularly parrots. It can also affect other exotic species such as budgies, cockatiels and macaws as well as ducks, gulls, sparrows and hens. It is an airborne disease that can be passed to people who own or work with exotic birds.