From the standpoint of a typical fertilization event, I would say that, yes, in a double ovulation cycle where there is successful fertilization after both ovulations, there will be a one to two week difference in developmental growth between the two waves of offspring. The alternative would have to be an arrest of the growth of the first zygotes by some hormonal pathway. That doesn't seem likely to me.

However, since babies all show a little variation in their size and weight even from a single ovulation, I think it would be very difficult for one to ever say "Oh, this half is all from the first ovulation, and these little guys are from the second."

Thoughts?

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• it's friday, I have a (silly?) question - AbsoluteApril, Fri Jul 25 11:10:58 2003
• RE: it's friday, I have a (silly?) question - DRW, Fri Jul 25 11:29:43 2003
• RE: it's friday, I have a (silly?) question - meretseger, Fri Jul 25 14:54:28 2003
• makes sense - AbsoluteApril, Fri Jul 25 18:47:35 2003