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,...
Chickens cause serious infections in humans. Intestinal bacteria from poultry can infect humans and cause urinary tract infections. A new study looks into disease transmission from animals to humans in a world of increasing antibiotic resistance. Chickens can infect humans with bacteria that cause urinary tract infections and in some cases heart valve infections. There is a growing concern in the international science community for potentially resistant bacteria that are transmitted from animals to humans.