Thanks for the replies.
I had eggs in my homemade bator which had been put in at three different times over a one week period. The first batch in that bator I hatched 15 out of 20 that developed to maturity. That time we turned eggs individually. This time I put the eggs in cartons with holes...
A while back there were a few posts about leaving the eggs in an upright position in a carton for hatching. A couple of members said they were going to try it. Any updates?