Well there was a lot of this going on in January before the eggs come about so I think they are fertile. This is a family forum so I'll put the image in the spoiler.
Oh I see

it certainly does look like the eggs must be fertile after all that action.
Poor Duchess continues to sit on her eggs.
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Ooo she makes me feel so sad.
I watch all the activity going on with Lipstick and Guy and their three eaglets and then I go and check on Duchess ... and she is so alone, like a one parent family, having to find food for herself and doing all the incubating.
Here are her eggs ..
.. they've been left alone and in the cold so often I think they have little hope of hatching. I wonder how long Duchess will continue to sit on them once the possibility of any chicks passes?
she doesn't seem to want to give up bless her, even in the rain she protects them .. .
meanwhile, Duke behaves like a single guy, coming and going as he pleases and showing little responsibility for Duchess or his eggs ...
he doesn't seem to have a clue whats going on. .. ^^ Duchess flew off for a break and instead of staying on the nest he just followed her ^^
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The three amigos continue to grow quick on the Farm Country nest.
A wet day on the nest.
Crikey! they are literally growing right before my very eyes , you can see a differnce in them from day to day, its amazing to watch.
I like this name!

.. its so hard to tell them apart when there are more than two,
the three Amigos suits them Michelle
I really enjoy seeing the interactions between Lipstick and Guy, they are very in tune with each other, but this made me laugh ...
^^ Guy was sitting on the eaglets and Lipstick wanted him to move so she could take over and she deliberately stands on his tail to try and get him up
Here they look like they are having a bit of a domestic ..
Lol! .. the way they are looking at each other
And finally heres a blob of eaglets ...
^^ with full tummies and tired eyes, they've melted into one big bundle
The transformation from grey ball of fluff to majestic Eagles is nothing short of a natural miracle.
It never ceases to astonish me how fast they grow, every year I still get that 'wow' feeling as I see them grow. I've noticed recently they are already starting to grow their first feathers, they change so quickly.