Egg Development

To: Alan Gillanders <>
Subject: Egg Development
From: Peter Woodall <>
Date: Tue, 25 Nov 2003 08:48:12 +1000
Hi Alan

In the majority of birds one egg is laid a day during the laying period.
The egg has to be fertilised after release from the ovary but before it
has the outer layers of albumen, shell membranes and shell added to it.

This means that it is fertilised soon after ovulation, when it is in the infundibulum,
 and about 24 hours later after passage down the oviduct,  it is laid,
the next one is ovulated, fertilised and so on.

After a mating, fertile sperm can be stored in the oviduct for at least a couple
of weeks, after that fertility of the eggs tends to decline.

Most research has been done in the domestic fowl, which lays one egg a day
as described above.

The intervals between laying are approximately one day in many birds but
they are 44-46 hours in domestic pigeon, average of 40 hours for Black-headed Gull, 2 days for raven, ostrich and rhea, 3 days for cassowaries, 4-5 days in Andean Condor
6-7 days for Masked Booby and as long as 44 days in Brown Kiwi.

In these cases with longer laying intervals I don't know how long it takes for the
egg to pass down the oviduct - perhaps still only one day - perhaps longer?



At 07:59 PM 24/11/2003 +1000, you wrote:

Could one of you very knowledgeable people out there please tell me the time it takes between fertilization and the laying of eggs in two or three representative bird species.


Birding-Aus is now on the Web at
To unsubscribe from this mailing list, send the message
"unsubscribe birding-aus" (no quotes, no Subject line)

<Prev in Thread] Current Thread [Next in Thread>

The University of NSW School of Computer and Engineering takes no responsibility for the contents of this archive. It is purely a compilation of material sent by many people to the birding-aus mailing list. It has not been checked for accuracy nor its content verified in any way. If you wish to get material removed from the archive or have other queries about the archive e-mail Andrew Taylor at this address: andrewt@cse.unsw.EDU.AU