My advice is just take a deep breath and relax if getting it done via vaginal ultrasound. Sorry if this TMI for any of you, but imagine the vaginal wand as if it were like your significant other putting himself in you.
The runner duck, the Cayuga, the blue Swedish and the buff duck are among the top layer ducks, averaging up to 180 eggs per year. Poor egg layers such as the mallard may lay as few as 60 eggs a year. Some specialized varieties such as the white layer duck can produce nearly 300 eggs a year.
When the weather is warm and a hen bred for egg production is healthy and in her prime, she'll lay one egg on average every 26 hours. If she were able to keep up this pace all year long, she'd produce about 337 eggs -- but most hens don't lay as many eggs in the winter as they do during the rest of the year. This brings the average down to around 265 eggs per year for a normal production hen, or a little more than two eggs every three days.