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.
Commercial hybrids in controlled conditions can lay 320 eggs in their first laying year. After that, they lay about 20% fewer eggs each laying year. These types of chickens will lay about one egg a day for 10+ days, then take a day or two off. Backyard chickens will lay fewer.