All ducks eggs died before hatching..help?

[GarnerZoo]

I've got a pair of Welsh Harlequins, and they've had a successful brood before, but this time every single one of her eggs has started dying. They all stopped developing either right before getting feathers or right after, but she still sat on them until they rotted to the point of breaking open or exploding? She's still sitting on one egg, but I fear it's rotted and died as well because the last 4 turned black and 3 have died, but had completely ready to hatch babies inside..but they were dead..
Does anyone know what's going on? How can I prevent this from happening again?
My female refuses to give up on the last egg even tho I think it's dead already (they were scheduled to hatch last weekend) and I feel so bad for her. Sitting over a month on all these eggs just for them to die before hatching

 

[chickens really]

Sorry....I wish I could be of more help....I also have a Hen setting and no idea if they are going to hatch?....She is a first time mother ..I usually incubate all my Duck eggs...This time I let her do it..

Best wishes..

 

[GarnerZoo]

Last egg finally got kicked out...was another fully formed baby with feathers, but it was a rotted egg and baby was dead..please, if anyone knows how I can prevent this from happening again let me know

 

[chickens really]

Not to sound sarcastic at all...Buy an incubator and a good one...Hovabator 1588 are great...Collect your eggs and hatch them....

Sorry this failed......

 

[Yorkshire Coop]

Sorry to hear about the poor hatch @GarnerZoo

Has anything changed within your flock? Are your birds much older now than when they raised a brood before?

Here is a good article ~ https://www.backyardchickens.com/a/diagnosing-hatch-failures-it-starts-with-the-egg

 

[GarnerZoo]

Not to sound sarcastic at all...Buy an incubator and a good one...Hovabator 1588 are great...Collect your eggs and hatch them....

Sorry this failed......

My female duck enjoys sitting on eggs and hatching her own brood, I wouldn't even be hatching eggs if she didn't want them..I appreciate the incubator recemondation tho

 

[GarnerZoo]

Sorry to hear about the poor hatch @GarnerZoo

Has anything changed within your flock? Are your birds much older now than when they raised a brood before?

Here is a good article ~ https://www.backyardchickens.com/a/diagnosing-hatch-failures-it-starts-with-the-egg

Thanks for the article, I'll be sure to read it! And not really, they were about 1 year old when they had first brood and now they're 3, she picked a new nesting spot, but that's all