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,...
Coccidiosis in Rabbits. Coccidiosis is a widespread parasitic disease that can infect rabbits. Other animals which may be affected by the disease include chickens, dogs, cats, cattle and sheep. However, different species of parasites causing coccidiosis affect different animals. Wild rabbits are more commonly affected as opposed to domesticated rabbits.