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,...
Psittacosis is also known as 'parrot fever,' ornithosis, or chlamydiosis. It is a widespread disease caused by an organism called Chlamydophila psittaci. Psittacosis can infect a variety of species including humans, birds, cows, cats, goats, sheep, and pigs. Among the bird species, it will infect just about anything with feathers including pet birds (psittacines), ratites, pigeons, poultry, ducks, and other migratory birds.