ok thank you so much you make it easy to understand.
You could have sex a day or two before ovulation and get preggo...the sperm are essentially there waiting for the egg...or it could be the day after and you catch it within that time...thats why its impossible to pinpoint actual conception
The female egg has to be fertilized within 24hrs of being released from your ovary or it dies...soooo...you had to have ovulated within that 24hr period